SSA’s Blue Book Breakdown – Every Disabling Impairment Explained

Updated on September 23, 2025

Your Guide to the SSA’s List of Disabling Impairments

Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI) application process - List of disabling impairments

Applying for Social Security Disability (SSD) benefits can be tough. Many people find it hard to understand what conditions qualify. We know this can be confusing, especially when you are also dealing with health issues.

The Social Security Administration (SSA) uses a special guide. It is called the ‘Listing of Impairments,’ or the ‘Blue Book.’ This book lists medical conditions that are severe enough to qualify for benefits.

In this extensive guide, we will explore the Blue Book in detail. We will examine its main parts and the 14 types of disabling conditions it covers. We will explain what kind of medical proof you need. We will also share how the SSA looks at mental health conditions and other common issues.

Our goal is to make these rules clear. We want to help you understand what it takes to get the support you deserve. For a deeper look at specific conditions and their requirements, a comprehensive AppAid disabling impairments guide can provide extra help.

What is the SSA Listing of Impairments?

The Social Security Administration’s Listing of Impairments, commonly known as the “Blue Book,” is the cornerstone for evaluating disability claims. It’s a comprehensive guide detailing specific medical criteria that the SSA uses to determine if an individual’s condition is severe enough to prevent them from engaging in substantial gainful activity. This crucial document is divided into two main parts: Part A for Adults and Part B for Children.

Part A outlines the medical criteria for individuals aged 18 and over, covering various severe medical conditions across multiple body systems. These listings describe impairments considered, by definition, to be so severe that they prevent an adult from performing any substantial work. Similarly, Part B provides specific criteria for evaluating disabling conditions in children under 18, although children can sometimes be assessed under adult criteria if their disease processes are similar.

The Blue Book’s purpose is to standardize the disability determination process, ensuring that decisions are made consistently based on objective medical evidence. It is a critical reference for disability examiners, medical consultants, and administrative law judges. Understanding its structure and content is vital for anyone navigating the disability application process. You can find the official listings and detailed information directly from the Social Security Administration Listing of Impairments.

How the SSA Determines Eligibility

The SSA employs a rigorous five-step sequential evaluation process to determine disability eligibility. The Blue Book is pivotal, specifically at Step 3 of this evaluation.

Infographic explaining the SSA's 5-step sequential evaluation process - List of disabling impairments infographic

At Step 3, the SSA assesses whether an applicant’s impairment or combination of impairments “meets” or “equals” a listing in the Blue Book.

  • Meeting a listing means your medical evidence matches all the criteria described for a specific condition within the Blue Book. These criteria often include specific diagnostic test results, clinical findings, and functional limitations. If your condition meets a listing, you are generally found disabled without further consideration of your ability to perform past work or any other work.
  • Equaling a listing occurs when your impairment, or combination of impairments, is medically equivalent in severity and duration to a listed impairment, even if it doesn’t perfectly match all the criteria of a specific listing. This requires a medical professional to determine that your condition is just as severe and disabling as one that is explicitly listed.

If your condition does not meet or equal a listing, the evaluation proceeds to Step 4 and Step 5, where the SSA considers your Residual Functional Capacity (RFC). RFC assesses your ability to perform work-related activities despite your limitations. It evaluates what you can do, such as sitting, standing, lifting, carrying, understanding, remembering, and interacting with others. The SSA uses your RFC to determine if you can perform your past relevant work or any other type of work in significant numbers in the national economy.

A crucial requirement for all disability claims is the 12-month duration rule. To qualify for benefits, your disabling condition must be expected to last for a continuous period of at least 12 months or be expected to result in death. Conditions that are temporary or resolve within a year generally do not meet the SSA’s definition of disability.

The 14 Major Categories of Disabling Impairments

Doctor reviewing a patient's medical chart - List of disabling impairments

The SSA’s Blue Book categorizes disabling conditions into 14 major sections, each focusing on a specific body system. This structured approach helps ensure a consistent and thorough evaluation of diverse medical impairments. Each category outlines specific criteria, symptoms, and diagnostic evidence for establishing a disability. This section will detail these 14 impairment categories from the SSA’s Blue Book, providing examples and relevant statistics to give you a clearer picture of what the SSA considers.

Musculoskeletal and Neurological Disorders

These two categories represent a significant portion of disability claims, affecting movement, sensation, and overall physical function.

  • Musculoskeletal Disorders (1.00): This section covers conditions affecting the bones, joints, muscles, and soft tissues of the body. These disorders can severely limit mobility, strength, and dexterity. They are among the most common reasons individuals apply for disability, accounting for 30.1% of disability recipients. Examples include chronic back pain, severe arthritis (like rheumatoid arthritis or osteoarthritis), amputations, and conditions resulting from injuries that lead to persistent functional limitations. For instance, a severe spinal cord injury can lead to paralysis or significant motor deficits, often qualifying under this listing. The criteria usually involve documentation of severe anatomical loss, reconstructive surgeries, or persistent inability to ambulate effectively.
  • Neurological Disorders (11.00): This includes conditions affecting the brain, spinal cord, and peripheral nerves. These can lead to a wide range of symptoms, from seizures and cognitive deficits to muscle weakness and sensory loss. Examples of conditions evaluated under this section include epilepsy, which involves recurrent seizures unresponsive to treatment; multiple sclerosis, a progressive disease of the central nervous System; Parkinson’s Disease, a progressive disorder affecting movement; and severe conditions like ALS or Lou Gehrig’s disease, which is a rapidly progressive neurodegenerative disease. The SSA evaluates these based on the frequency and severity of symptoms, their impact on daily functioning, and objective medical findings from neurological examinations and diagnostic tests.

Special Senses, Speech, and Respiratory Conditions

These impairments can significantly impact an individual’s ability to communicate, perceive their environment, and breathe effectively.

  • Special Senses and Speech (2.00): This category addresses vision, hearing, and speech impairments. Approximately 10% of SSDI recipients have at least one sense or speech disorder.
  • Blindness: Defined by specific levels of visual acuity (e.g., 20/200 or worse in the better eye with best correction) or visual field limitations.
  • Deafness: Evaluated based on audiometric test results, reflecting severe hearing loss. The criteria are very technical. If you have severe hearing loss but haven’t received cochlear implants, the rules come down to your results on audiometric tests and otologic exams. We recommend looking at the SSA guide to sensory disorders and discussing them with your doctor. You might even want to bring the SSA Blue Book definition to your doctor and ask them to note your test results in your medical records.
  • Speech Loss: Involves the inability to produce speech that can be understood, typically due to neurological or structural issues.
  • Respiratory Disorders (3.00): This section covers chronic conditions affecting the lungs and respiratory System that severely impair breathing. These conditions account for 2.4% of disability recipients. Examples include Chronic Obstructive Pulmonary Disease (COPD), severe asthma, cystic fibrosis, and other chronic lung diseases that lead to persistent respiratory insufficiency, requiring frequent hospitalizations or continuous oxygen therapy. The evaluation often relies on spirometry test results (measuring lung function) and documentation of exacerbations and their impact on daily life.

Cardiovascular and Digestive System Impairments

Conditions affecting the heart, blood vessels, and the digestive tract can significantly limit an individual’s physical capacity and overall health.

  • Cardiovascular System (4.00): Heart and vascular conditions are a common cause of disability, affecting 6.8% of people on SSDI. This category includes conditions such as chronic heart failure, ischemic heart disease (coronary artery disease), recurrent arrhythmias, and peripheral artery disease. The SSA evaluates these conditions based on objective findings from diagnostic tests (e.g., echocardiograms, stress tests), symptoms like chest pain or shortness of breath, and their impact on physical activity and daily functioning. The Social Security Administration uses specific criteria to assess the severity of cardiovascular impairments, often requiring evidence of significant functional limitations despite prescribed treatment.
  • Digestive System (5.00): Disorders of the digestive System that cause severe and chronic symptoms, leading to significant weight loss, malnutrition, or other complications, can qualify for disability. These conditions affect 1.4% of disability recipients. Examples include severe Crohn’s disease, ulcerative colitis, chronic liver disease (e.g., cirrhosis with complications), and short bowel syndrome. The criteria often involve documentation of persistent symptoms, hospitalizations, surgical interventions, and objective evidence of organ damage or nutritional deficiencies.

A Deeper Dive into AppAid Disabling Impairments: Mental Health

Mental health conditions represent a substantial portion of disability claims, with 34.6% of Social Security Disability applicants having a mental health condition. This highlights the widespread impact of these conditions on an individual’s ability to work and function.

  • Mental Disorders (12.00): This comprehensive category covers a broad spectrum of mental health conditions, including:
  • Depression and Anxiety Disorders: Severe forms leading to persistent low mood, loss of interest, panic attacks, or generalized anxiety that significantly impair daily activities.
  • Post-Traumatic Stress Disorder (PTSD): Characterized by intrusive thoughts, avoidance, negative mood, and hyperarousal following a traumatic event, leading to severe functional limitations.
  • Autism Spectrum Disorder: Developmental disorders characterized by difficulties in social interaction and communication, as well as restricted, repetitive patterns of behavior, interests, or activities.
  • Schizophrenia and other Psychotic Disorders: Involving delusions, hallucinations, disorganized thinking, and negative symptoms that severely affect a person’s ability to function independently.
  • Bipolar Disorder, Intellectual Disorders, Neurocognitive Disorders (e.g., early-onset Alzheimer’s), and Personality Disorders.

The Social Security Administration evaluates mental disorders using a specific framework that goes beyond just a diagnosis. They look for evidence of functional limitations that are “marked” or “extreme” in at least two of four areas known as the “paragraph B” criteria:

  1. Understand or apply information.
  2. Interact with others.
  3. Concentrate, persist, or maintain pace.
  4. Adapt or manage oneself.

Additionally, for some disorders, the SSA uses “paragraph C” criteria, which focus on the duration of a medically documented history of the disorder and its impact on your ability to function outside a highly supportive living arrangement.

The challenge with mental health claims often lies in subjective evidence. While objective medical tests are standard for physical ailments, mental health conditions rely heavily on treatment history, therapist notes, psychological evaluations, and reports from third parties (friends, family, former employers) about an individual’s functional limitations. This makes thorough documentation and consistent treatment crucial for a successful claim.

Other Qualifying Body System Disorders

Beyond the most common categories, the Blue Book includes several other vital sections covering a diverse array of disabling impairments:

  • Genitourinary Disorders (6.00): These conditions affect the kidneys, bladder, and other parts of the urinary and reproductive systems. 1.7% of current SSDI recipients have a genitourinary condition. The most common qualifying condition in this category is chronic kidney disease, particularly end-stage renal disease requiring dialysis or a kidney transplant.
  • Hematological Disorders (7.00): This section covers disorders of the blood and bone marrow, such as sickle cell disease, chronic anemia, and clotting disorders. These conditions affect 0.3% of people on disability, often leading to severe fatigue, pain crises, or increased risk of infection.
  • Skin Disorders (8.00): Severe and chronic skin conditions resistant to treatment and significantly limiting daily activities can qualify. This includes extensive burns, chronic dermatitis, or genetic photosensitivity disorders. 0.2% of disability recipients have a skin disorder.
  • Endocrine Disorders (9.00): This category includes conditions affecting hormone-producing glands, such as diabetes, thyroid disorders, and adrenal gland disorders. These affect 2.3% of benefit recipients. While diabetes itself might not always be a listing, its severe complications (neuropathy, retinopathy, and kidney disease) often meet criteria in other body systems. For other endocrine disorders, we recommend finding the section most related to your symptoms or consulting the SSA guide.
  • Congenital Disorders that Affect Multiple Body Systems (10.00): This category is specifically for conditions present at birth that affect multiple body systems, such as non-mosaic Down syndrome. These are often considered disabling from birth.
  • Cancer (Malignant Neoplastic Diseases) (13.00): Various types of cancer can qualify for disability benefits, accounting for 3.0% of benefit recipients. The evaluation depends on the type of cancer, its stage, metastasis, and response to treatment. Some aggressive cancers or those that have metastasized automatically meet a listing, while others are evaluated based on their residuals after treatment.
  • Immune System Disorders (14.00): This section covers conditions where the immune system is compromised or attacks the body’s tissues. Examples include lupus, HIV/AIDS, and inflammatory arthritis. The criteria focus on the severity of organ involvement, frequency of exacerbations, and limitations in daily functioning.

Proving Your Disability: Evidence, Fast-Tracking, and Common Problems

Person organizing medical documents and bills - List of disabling impairments

Successfully navigating a disability claim hinges on providing robust and compelling evidence. The SSA relies heavily on medical documentation to assess the severity and impact of your impairments. It’s a complex process, and it’s essential to understand that most initial Social Security Disability claims are denied. This high denial rate underscores the need for meticulous preparation and a clear understanding of what the SSA requires. For a broader perspective on disability and health, the Disability and Health Overview | CDC offers valuable insights into the prevalence and impact of various conditions.

Essential Medical Evidence for Your Claim

The bedrock of any successful disability claim is objective medical evidence. This includes:

  • Doctor’s Notes and Treatment Records: Comprehensive records from all treating physicians, specialists, and therapists detailing diagnoses, symptoms, prognoses, and the functional limitations caused by your condition.
  • Lab Results: Blood tests, urine tests, biopsies, and other laboratory findings that confirm diagnoses or indicate disease activity.
  • Imaging Reports: X-rays, MRIs, CT scans, and other diagnostic imaging that provide objective evidence of anatomical abnormalities or disease progression.
  • Functional Reports (RFC Forms): While not strictly “objective” in the same way as a lab test, these forms, completed by your treating physician, are critical. They detail your Residual Functional Capacity (RFC), outlining specific limitations in your ability to sit, stand, walk, lift, carry, stoop, bend, reach, and perform mental tasks. These forms translate your medical condition into work-related limitations, which is what the SSA needs to assess your ability to work.
  • Hospitalization Records: Document any hospital stays, emergency room visits, or surgeries related to your disabling condition.

It’s not just about having a diagnosis; it’s about demonstrating the severity and duration of your impairment and how it prevents you from working. The SSA looks for a longitudinal medical history, meaning consistent documentation that shows your condition has been ongoing, its symptoms have persisted despite treatment, and its impact on your functional abilities. As highlighted in The Surgeon General’s Call to Action to Improve the Health and Wellness of Persons with Disabilities, a holistic view of an individual’s health and functional status is essential.

Fast-Track Programs: Compassionate Allowances and TERI

The SSA has established programs to expedite the disability determination process for certain extremely severe conditions. These “fast-track” programs recognize that some conditions are so debilitating that they inherently meet disability criteria.

  • Compassionate Allowances (CAL): The CAL program identifies diseases and conditions that, by definition, meet the SSA’s statutory standard for disability. These conditions are typically severe, rapidly progressive, or immediately life-threatening. When an applicant’s claim includes a CAL condition, the SSA aims to determine disability within weeks rather than months.
  • Common CAL conditions include: Certain aggressive cancers (e.g., pancreatic cancer, glioblastoma), early-onset Alzheimer’s disease, amyotrophic lateral sclerosis (ALS), and specific rare genetic or neurological disorders.
  • Terminal Illness (TERI) Program: This program fast-tracks claims for individuals whose medical condition is untreatable and expected to result in death. While not a separate listing, a TERI designation ensures that the claim receives priority processing.

Even with these fast-track programs, applicants must still meet the SSA’s non-medical eligibility criteria, such as work history requirements for SSDI. However, the medical evidence review is significantly streamlined.

When One Condition Isn’t Enough: Multiple Impairments

It’s common for individuals to suffer from more than one medical condition. When you have multiple impairments or co-occurring conditions, the SSA doesn’t just look at each condition in isolation. Instead, they consider the combined effects of all your impairments on your ability to function.

Even if no condition meets a Blue Book listing, the cumulative impact of several conditions might result in a significantly reduced Residual Functional Capacity (RFC). For example, someone with chronic back pain (musculoskeletal) combined with severe depression (mental disorder) might be more limited than if they had only one of these conditions. The back pain might limit their ability to stand or lift. In contrast, the depression might impair their concentration and ability to interact with others, making it impossible to perform any work.

Proving this cumulative impact can be complex. It requires meticulous documentation from all treating providers, clearly outlining how each condition contributes to functional limitations. This is where professional representation becomes key for complex cases. An experienced disability advocate can help gather the necessary evidence and articulate how the combined effects of your impairments prevent you from engaging in substantial gainful activity.

How to Steer the Application and Appeals Process for AppAid Disabling Impairments

Person talking with a disability advocate - List of disabling impairments

Navigating the Social Security Disability application and appeals process can be daunting. It involves multiple stages, strict deadlines, and a deep understanding of SSA regulations. The journey often begins with an initial application and can extend through several levels of appeal.

What to Do If Your Initial Claim is Denied

As mentioned earlier, most initial Social Security Disability claims are denied. This can be discouraging, but it’s crucial to understand that a denial is not the end of the road. Many successful claims are ultimately approved during the appeals process.

If your initial claim is denied, you have the right to appeal. The appeals process typically involves several stages:

  1. Reconsideration: This is the first level of appeal. Your case will be reviewed by a different examiner and a medical consultant who were not involved in the initial decision. You can submit new medical evidence at this stage.
  2. Administrative Law Judge (ALJ) Hearing: If reconsideration is denied, you can request a hearing before an Administrative Law Judge. This is often the most critical stage, as you and your representative can present your case in person, offer testimony, and cross-examine vocational or medical experts.
  3. Appeals Council Review: If the ALJ denies your claim, you can ask the SSA Appeals Council to review the ALJ’s decision. The Council can affirm, reverse, or remand your case for a new hearing.
  4. Federal Court Review: As a last resort, you can file a lawsuit in a federal district court.

Throughout this process, strict deadlines apply to each appeal stage. Missing a deadline can result in the permanent loss of your right to appeal. To strengthen your case, gathering new evidence, such as updated medical records, additional doctors’ opinions, or functional capacity evaluations, is vital at each appeal stage.

The Role of a Disability Advocate in Your Claim

Given the complexity and high initial denial rates, the role of a disability advocate or attorney cannot be overstated. An experienced professional can significantly improve your chances of approval. They bring expertise in several key areas:

  • Understanding Blue Book Criteria: Advocates are intimately familiar with the SSA’s Listing of Impairments and can help identify how your medical evidence aligns with these criteria or demonstrates medical equivalence.
  • Communicating with the SSA: They handle all correspondence and communication with the Social Security Administration on your behalf, ensuring all forms are completed accurately and deadlines are met.
  • Filing Appeals Correctly: They guide you through each stage of the appeals process, preparing and submitting the necessary paperwork and new evidence.
  • Representing You at Hearings: At an ALJ hearing, an advocate can present your case persuasively, question witnesses, and ensure that the judge fully understands the extent of your disabling impairments and functional limitations.

A comprehensive AppAid disabling impairments guide can provide further details, but working with a professional ensures your case is presented in the strongest possible light. They can help you gather the proper medical evidence, frame your arguments effectively, and navigate the bureaucratic problems, allowing you to focus on your health rather than the complexities of the application process.

Frequently Asked Questions about Disabling Impairments

Navigating Social Security Disability can bring up many questions. Here, we address some of the most common inquiries regarding disabling impairments and the application process.

What are the most common disabilities approved for benefits?

While the SSA evaluates various conditions, specific categories consistently represent the highest number of approved claims. Based on statistics from the Social Security Administration and our research, the most common disabilities approved for benefits include:

  • Musculoskeletal disorders: These are conditions affecting the back, joints, and limbs, such as severe arthritis, degenerative disc disease, and other orthopedic issues. They account for a significant portion of approvals due to their direct impact on physical work capacity.
  • Mental health conditions: Disorders like depression, anxiety, bipolar disorder, and schizophrenia are increasingly recognized for their debilitating effects on concentration, social interaction, and daily functioning.
  • Neurological disorders: Conditions such as epilepsy, multiple sclerosis, and Parkinson’s disease, which can cause severe motor, sensory, or cognitive impairments.
  • Cardiovascular conditions: Heart-related issues like chronic heart failure and coronary artery disease that limit physical exertion.
  • Cancer: Various types of cancer, especially those that are aggressive, metastatic, or have severe side effects from treatment.

These categories represent most approved claims because they frequently meet the stringent medical criteria outlined in the Blue Book or significantly reduce an individual’s Residual Functional Capacity.

Can I qualify for disability if my condition isn’t in the Blue Book?

Yes, absolutely. It’s a common misconception that if your condition isn’t explicitly listed in the Blue Book, you cannot qualify for disability benefits. This is not true. The Blue Book provides examples of severe impairments but is not an exhaustive list of every possible disabling condition.

If your condition is not explicitly listed, the SSA will evaluate your claim based on medical equivalence. This means they will determine if your impairment, or combination of impairments, is as severe and disabling as a condition that is listed. They will assess your Residual Functional Capacity (RFC) to do this.

The RFC assessment determines what you can still do despite your limitations. Suppose your medical evidence demonstrates that your condition, even if unlisted, causes functional limitations that prevent you from performing your past work and any other type of work in the national economy. In that case, you can still be found disabled. This process often involves proving that your limitations are so severe that they prevent all work, which can be a complex argument where an advocate’s help is invaluable. They can help gather the correct medical opinions and documentation to support your claim for medical equivalence.

What are the differences in evaluating physical vs. mental impairments?

While physical and mental impairments are evaluated under the SSA’s Blue Book criteria and the five-step sequential process, there are distinct differences in the types of evidence required and how they are assessed.

  • Physical Claims: These claims often rely heavily on objective evidence, such as:
  • Diagnostic imaging (X-rays, MRIs, CT scans) showing structural damage or abnormalities.
  • Laboratory test results (blood tests, biopsies) confirming diagnoses or disease activity.
  • Physical examination findings (range of motion, muscle strength, neurological deficits).
  • Functional capacity evaluations (FCEs) measure physical abilities. The focus is on measurable limitations in physical activities like lifting, carrying, standing, sitting, and walking.
  • Mental Health Claims: While some objective evidence exists (e.g., psychological testing, neuroimaging for cognitive disorders), these claims often depend more on subjective evidence and the cumulative impact on daily functioning. Key evidence includes:
  • Detailed treatment history from psychiatrists, psychologists, and therapists.
  • Mental status examination findings.
  • Reports from treating professionals detailing symptoms, diagnoses, prognosis, and functional limitations in areas like concentration, social interaction, and adaptive functioning.
  • Third-party observations from family, friends, or former employers about how the condition affects daily life. The SSA explicitly uses the “paragraph B” and “paragraph C” criteria for mental disorders, focusing on the severity of functional limitations in understanding, interacting, concentrating, and adapting.

Both types of claims require extensive documentation, but the nature of that documentation differs. For mental health claims, consistent treatment, detailed therapy notes, and clear statements from mental health professionals about functional limitations are particularly crucial.

Conclusion: Taking the Next Step

Navigating the SSA’s list of disabling impairments is a significant challenge, especially when dealing with a health condition. The process is complex, the evidence requirements are strict, and initial denials are common. Understanding the Blue Book is the first step, but successfully proving your case often requires expert guidance.

We’ve explored the 14 major categories of impairments, the critical role of medical evidence, and the nuances of the application and appeals process. Whether your condition is explicitly listed or you need to prove medical equivalence, thorough preparation and accurate documentation are paramount.

If you feel overwhelmed by the intricacies of the Social Security Disability system, consider seeking professional help. An experienced advocate can manage the complexities of your application or appeal, significantly increasing your chances of approval and allowing you to focus on your health. Don’t let the daunting process deter you from seeking the benefits you may be entitled to. Take a free online evaluation to see if you qualify for assistance.

+ posts

Throughout the year, our writers feature fresh, in-depth, and relevant information for our audience of 40,000+ healthcare leaders and professionals. As a healthcare business publication, we cover and cherish our relationship with the entire health care industry including administrators, nurses, physicians, physical therapists, pharmacists, and more. We cover a broad spectrum from hospitals to medical offices to outpatient services to eye surgery centers to university settings. We focus on rehabilitation, nursing homes, home care, hospice as well as men’s health, women’s heath, and pediatrics.

Disclaimer: The content on this site is for general informational purposes only and is not intended as medical, legal, or financial advice. No content published here should be construed as a substitute for professional advice, diagnosis, or treatment. Always consult with a qualified healthcare or legal professional regarding your specific needs.

See our full disclaimer for more details.