Understanding the SSA Blue Book (Listing of Impairments)

What Is the Blue Book?

The SSA Blue Book, officially titled the Listing of Impairments, is a comprehensive medical reference guide used by the Social Security Administration (SSA) to evaluate disability claims for both Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI). The Blue Book is codified in the Code of Federal Regulations at 20 CFR Part 404, Subpart P, Appendix 1.

The Blue Book describes, for each of 14 body systems, the medical criteria that SSA considers severe enough to prevent an individual from performing substantial gainful activity (SGA). Each body system section contains multiple "listings" — specific conditions with detailed requirements for signs, symptoms, laboratory findings, and functional limitations that must be documented.

The Blue Book is divided into two parts:

• Part A: Listings for adults (age 18 and older), used for both SSDI and adult SSI claims.
• Part B: Listings for children (under age 18), used for childhood SSI claims.

How SSA Uses the Blue Book

The Blue Book is applied at Step 3 of SSA's five-step sequential evaluation process (defined in 20 CFR §404.1520). After SSA determines that you are not working above the SGA level (Step 1) and that your impairment is severe (Step 2), the disability examiner checks whether your condition meets or medically equals any of the listings in the Blue Book.

If your condition meets or equals a listing, SSA finds you disabled without any further analysis of your ability to work. This means you are approved without SSA needing to evaluate your past work or whether you could do other jobs — the condition is considered so severe that no one with it could be expected to work.

If your condition does not meet or equal a listing, SSA moves to Steps 4 and 5, where they assess your Residual Functional Capacity (RFC) and determine whether you can perform your past work or any other work that exists in the national economy. Many claimants who do not meet a Blue Book listing are still approved through this RFC process. For details on the full eligibility requirements, see our dedicated guide.

The 14 Body Systems

The Blue Book organizes medical conditions into 14 body systems, each covering a group of related medical conditions. Each body system section begins with an introductory section (e.g., Section 1.00) that explains how SSA evaluates conditions in that category, followed by individual listings with specific diagnostic and functional criteria.

Below, we provide an overview of each body system, the types of conditions it covers, key listings, and the documentation SSA requires. For each category, we reference the specific section numbers so you can review the detailed criteria on the SSA website.

1.00 — Musculoskeletal Disorders

Section 1.00 covers disorders of the skeletal spine and extremities, including bones, joints, ligaments, tendons, muscles, and associated soft tissue. This is the most common category of disability claims. The listings were significantly revised effective April 2, 2021.

Key listings include:

• 1.15 — Disorders of the skeletal spine resulting in compromise of a nerve root (including degenerative disc disease, herniated disc, spinal stenosis, osteoarthritis, and facet arthritis)
• 1.16 — Lumbar spinal stenosis resulting in pseudoclaudication
• 1.17 — Reconstructive surgery or surgical arthrodesis of a major weight-bearing joint
• 1.18 — Abnormality of a major joint in any extremity
• 1.20 — Amputation of an extremity

For more information on musculoskeletal disorders and how to qualify, visit our back disorders conditions page.

2.00 — Special Senses and Speech

Section 2.00 covers disorders that affect vision, hearing, and speech. SSA evaluates these based on the best-corrected function remaining after treatment.

• 2.02 — Loss of central visual acuity (20/200 or less in the better eye with best correction)
• 2.03 — Contraction of the visual field in the better eye
• 2.04 — Loss of visual efficiency or visual impairment
• 2.07 — Hearing loss not treated with cochlear implantation
• 2.09 — Hearing loss treated with cochlear implantation
• 2.10 — Speech impairment with limited intelligibility

Note: The SGA threshold for individuals who are statutorily blind is $2,700 per month in 2026, compared to $1,620 for non-blind individuals.

3.00 — Respiratory Disorders

Section 3.00 covers chronic disorders of the respiratory system, including the airways, lungs, and thoracic cage. SSA primarily evaluates respiratory function through spirometry, DLCO (diffusing capacity), and arterial blood gas (ABG) tests.

• 3.02 — Chronic respiratory disorders (COPD, pulmonary fibrosis, asthma)
• 3.03 — Asthma (requiring hospitalization)
• 3.04 — Cystic fibrosis
• 3.09 — Chronic pulmonary hypertension
• 3.10 — Lung transplant

4.00 — Cardiovascular System

Section 4.00 covers disorders of the heart, aorta, or major arteries and veins. SSA evaluates cardiovascular function through clinical findings, exercise testing, imaging, and laboratory results. Visit our heart disease conditions page for detailed qualification criteria.

• 4.02 — Chronic heart failure
• 4.04 — Ischemic heart disease
• 4.05 — Recurrent arrhythmias
• 4.06 — Symptomatic congenital heart disease
• 4.09 — Heart transplant
• 4.10 — Aneurysm of the aorta or major branches
• 4.12 — Peripheral vascular disease

5.00 — Digestive System

Section 5.00 covers disorders of the gastrointestinal tract and related organs including the liver, gallbladder, and pancreas.

• 5.02 — Gastrointestinal hemorrhaging requiring transfusion
• 5.05 — Chronic liver disease
• 5.06 — Inflammatory bowel disease (IBD)
• 5.07 — Short bowel syndrome
• 5.08 — Weight loss due to any digestive disorder
• 5.09 — Liver transplant

6.00 — Genitourinary Disorders

Section 6.00 covers disorders of the kidneys, ureters, bladder, and urethra, including chronic kidney disease (CKD) and conditions requiring dialysis.

• 6.02 — Impairment of renal function (chronic kidney disease)
• 6.03 — Chronic hemodialysis or peritoneal dialysis
• 6.04 — Nephrotic syndrome

7.00 — Hematological Disorders

Section 7.00 covers disorders of the blood and blood-forming organs, including chronic anemia, sickle cell disease, and clotting disorders.

• 7.02 — Chronic anemia (hemoglobin below specified levels)
• 7.05 — Sickle cell disease requiring transfusions or with severe crises
• 7.08 — Coagulation defects (hemophilia)
• 7.10 — Bone marrow or stem cell transplantation

8.00 — Skin Disorders

Section 8.00 covers chronic conditions affecting the skin, including dermatitis, burns, and photosensitivity disorders. SSA evaluates the extent and persistence of skin lesions and their impact on function.

• 8.02 — Ichthyosis
• 8.03 — Bullous disease (e.g., pemphigus, dermatitis herpetiformis)
• 8.04 — Chronic infections of skin or mucous membranes
• 8.05 — Dermatitis (chronic, severe)
• 8.06 — Hidradenitis suppurativa
• 8.07 — Genetic photosensitivity disorders
• 8.08 — Burns (severe, with contractures or limitations)

9.00 — Endocrine Disorders

Section 9.00 covers disorders of the endocrine glands, including thyroid, parathyroid, adrenal, pituitary, and pancreatic (diabetes) conditions. Importantly, SSA does not have specific endocrine listings with numbered criteria. Instead, endocrine disorders are evaluated under the body system most affected by the condition. For example:

• Diabetes with peripheral neuropathy — evaluated under neurological (11.00) or cardiovascular (4.00)
• Diabetes with kidney disease — evaluated under genitourinary (6.00)
• Diabetes with vision loss — evaluated under special senses (2.00)
• Thyroid disorders with mental effects — evaluated under mental disorders (12.00)

10.00 — Congenital Disorders

Section 10.00 primarily appears in Part B (childhood listings) and covers congenital conditions that affect multiple body systems. The most notable listing is:

• 10.06 — Non-mosaic Down syndrome (qualifies with karyotype confirming the diagnosis, without additional evidence of functional limitations required)

Most other congenital conditions in adults are evaluated under the specific body system affected (e.g., congenital heart disease under 4.00).

11.00 — Neurological Disorders

Section 11.00 covers disorders of the central and peripheral nervous system. These listings require documentation of specific clinical findings from neurological examinations and often diagnostic imaging.

• 11.02 — Epilepsy (generalized or partial seizures despite treatment)
• 11.04 — Vascular insult to the brain (stroke)
• 11.06 — Parkinsonian syndrome
• 11.07 — Cerebral palsy
• 11.09 — Multiple sclerosis (MS)
• 11.10 — Amyotrophic lateral sclerosis (ALS)
• 11.14 — Peripheral neuropathy
• 11.17 — Neurodegenerative disorders of the central nervous system
• 11.18 — Traumatic brain injury

12.00 — Mental Disorders

Section 12.00 is the second most commonly cited section in disability claims. SSA evaluates mental disorders using a specific framework that considers both the diagnostic criteria and functional limitations in four areas: understanding/remembering/applying information; interacting with others; concentrating/persisting/maintaining pace; and adapting/managing oneself.

To meet a mental disorder listing, you typically must demonstrate that your condition results in "marked" limitations in two of the four functional areas or an "extreme" limitation in one area. Visit our mental health conditions page for detailed criteria.

• 12.02 — Neurocognitive disorders (dementia, TBI cognitive effects)
• 12.03 — Schizophrenia spectrum and other psychotic disorders
• 12.04 — Depressive, bipolar, and related disorders
• 12.06 — Anxiety and obsessive-compulsive disorders
• 12.07 — Somatic symptom and related disorders
• 12.08 — Personality and impulse-control disorders
• 12.10 — Autism spectrum disorder
• 12.11 — Neurodevelopmental disorders (ADHD, learning disorders, tic disorders)
• 12.13 — Eating disorders
• 12.15 — Trauma- and stressor-related disorders (PTSD)

13.00 — Cancer (Neoplastic Diseases)

Section 13.00 covers malignant neoplastic diseases (cancer). SSA evaluates cancer based on the origin, type, extent, and response to treatment. Many cancers are included in SSA's Compassionate Allowances list for expedited processing. Visit our cancer conditions page for more details.

• Listings cover cancers by site: head/neck (13.02), thyroid (13.09), breast (13.10), lung (13.14), liver (13.19), kidney (13.22), and many more
• SSA generally finds disability when cancer is inoperable, unresectable, recurrent, or when treatment side effects are disabling
• Many cancers have a specific time-limited period of disability followed by a Continuing Disability Review (CDR)

14.00 — Immune System Disorders

Section 14.00 covers disorders of the immune system, including autoimmune conditions, immunodeficiency disorders, and inflammatory conditions.

• 14.02 — Systemic lupus erythematosus (SLE)
• 14.04 — Systemic vasculitis
• 14.06 — Undifferentiated and mixed connective tissue disease
• 14.07 — Inflammatory arthritis (rheumatoid arthritis, psoriatic arthritis)
• 14.09 — Inflammatory bowel disease (overlaps with Section 5.00)
• 14.10 — Sjögren's syndrome
• 14.11 — HIV infection

Meeting vs. Equaling a Listing

Understanding the difference between meeting and equaling a listing is important for your disability claim:

When your condition does not precisely match every criterion in a listing, SSA can still find you disabled if your impairment (or combination of impairments) is medically equivalent to the severity of a listed impairment. This determination under 20 CFR §404.1526 requires review by a medical consultant or medical expert who compares your findings to the listing criteria.

What If Your Condition Is Not Listed?

The Blue Book does not cover every possible medical condition. Many common conditions — such as fibromyalgia, chronic fatigue syndrome, and migraines — do not have their own specific listings. However, this does not mean you cannot be approved for disability.

If your condition is not specifically listed, SSA will:

1. Evaluate under a related listing: SSA may assess your condition under the most closely related body system. For example, fibromyalgia might be evaluated under musculoskeletal (1.00), neurological (11.00), or mental disorders (12.00) depending on your primary symptoms.
2. Consider medical equivalence: Your condition's combined symptoms may equal the severity of an existing listing.
3. Assess your RFC: At Steps 4 and 5, SSA evaluates your Residual Functional Capacity — what work activities you can still perform despite your limitations. Even without matching a listing, if SSA determines that no jobs exist in the national economy that you can perform given your RFC, age, education, and work experience, you will be found disabled.

The RFC-based approach (Steps 4-5) is actually how the majority of disability claims are approved. Working with a disability attorney or advocate can help ensure your RFC is accurately documented and presented to SSA.

Tips for Strengthening Your Claim

Understanding the Blue Book gives you a significant advantage when filing your disability claim. Here are practical steps to improve your chances of approval:

When preparing your application, cross-reference your medical records against the specific listing criteria for your condition. If your condition involves multiple body systems, make sure to document the impact on each system. For guidance on the application process itself, see our How to Apply for SSDI guide.

If your initial application is denied, understanding the Blue Book criteria can help you prepare a stronger appeal. Our reconsideration and ALJ hearing guides cover the appeals process in detail.