ICD-10-CM diagnosis codes
Search 98,000+ diagnosis codes by number or by condition. Every code shows whether it is billable, which chapter it belongs to, and the official description — free, no login.
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Browse by chapter
ICD-10-CM organizes diagnoses into 22 chapters by body system and condition type.
- A00-B99Chapter 1
Certain infectious and parasitic diseases
- C00-D49Chapter 2
Neoplasms
- D50-D89Chapter 3
Diseases of the blood and blood-forming organs
- E00-E89Chapter 4
Endocrine, nutritional and metabolic diseases
- F01-F99Chapter 5
Mental, behavioral and neurodevelopmental disorders
- G00-G99Chapter 6
Diseases of the nervous system
- H00-H59Chapter 7
Diseases of the eye and adnexa
- H60-H95Chapter 8
Diseases of the ear and mastoid process
- I00-I99Chapter 9
Diseases of the circulatory system
- J00-J99Chapter 10
Diseases of the respiratory system
- K00-K95Chapter 11
Diseases of the digestive system
- L00-L99Chapter 12
Diseases of the skin and subcutaneous tissue
- M00-M99Chapter 13
Diseases of the musculoskeletal system and connective tissue
- N00-N99Chapter 14
Diseases of the genitourinary system
- O00-O9AChapter 15
Pregnancy, childbirth and the puerperium
- P00-P96Chapter 16
Certain conditions originating in the perinatal period
- Q00-QA0Chapter 17
Congenital malformations and chromosomal abnormalities
- R00-R99Chapter 18
Symptoms, signs and abnormal clinical findings
- S00-T88Chapter 19
Injury, poisoning and other external causes
- V00-Y99Chapter 20
External causes of morbidity
- Z00-Z99Chapter 21
Factors influencing health status
- U00-U85Chapter 22
Codes for special purposes
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ICD-10-CM FY2026, published by the National Center for Health Statistics and the Centers for Medicare & Medicaid Services. Public domain. Codes take effect October 1 each year. See all free tools