ICD-10-CM Code Lookup
Search the full ICD-10-CM catalog (CMS, FY2026) by code or description — chapters, categories, and billable codes.
Most searched codes
ICD-10-CM chapters
Chapter 1 · A00–B99.9
Certain infectious and parasitic diseases
1,309 codes
Chapter 2 · C00–D49.9
Neoplasms
2,178 codes
Chapter 3 · D50–D89.9
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
401 codes
Chapter 4 · E00–E89.89
Endocrine, nutritional and metabolic diseases
1,267 codes
Chapter 5 · F01–F99
Mental, behavioral and neurodevelopmental disorders
1,112 codes
Chapter 6 · G00–G99.8
Diseases of the nervous system
932 codes
Chapter 7 · H00–H59.89
Diseases of the eye and adnexa
3,466 codes
Chapter 8 · H60–H95.89
Diseases of the ear and mastoid process
871 codes
Chapter 9 · I00–I99.9
Diseases of the circulatory system
1,798 codes
Chapter 10 · J00–J99
Diseases of the respiratory system
471 codes
Chapter 11 · K00–K95.89
Diseases of the digestive system
1,109 codes
Chapter 12 · L00–L99
Diseases of the skin and subcutaneous tissue
1,206 codes
Chapter 13 · M00–M99.9
Diseases of the musculoskeletal system and connective tissue
8,674 codes
Chapter 14 · N00–N99.89
Diseases of the genitourinary system
1,044 codes
Chapter 15 · O00–O9A.53
Pregnancy, childbirth and the puerperium
3,023 codes
Chapter 16 · P00–P96.9
Certain conditions originating in the perinatal period
565 codes
Chapter 17 · Q00–Q99.9
Congenital malformations, deformations and chromosomal abnormalities
1,066 codes
Chapter 18 · R00–R99
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
962 codes
Chapter 19 · S00–T88.9XXS
Injury, poisoning and certain other consequences of external causes
54,261 codes
Chapter 22 · U07–U09.9
Codes for special purposes
5 codes
Chapter 20 · V00–Y99.9
External causes of morbidity
10,602 codes
Chapter 21 · Z00–Z99.89
Factors influencing health status and contact with health services
1,844 codes
Informational content based on ICD-10-CM (CMS). It does not replace evaluation, diagnosis, or care by a licensed health professional.