ICD-10 Official Guidelines
FY 2026 (October 1, 2025 - September 30, 2026)
Introduction & General Guidelines
Chapter-Specific Guidelines
- I.C.1Chapter 1: Infectious and Parasitic DiseasesA00-B99
- I.C.2Chapter 2: NeoplasmsC00-D49
- I.C.3Chapter 3: Blood and Immune DisordersD50-D89
- I.C.4Chapter 4: Endocrine, Nutritional, and Metabolic DiseasesE00-E89
- I.C.5Chapter 5: Mental, Behavioral and Neurodevelopmental DisordersF01-F99
- I.C.6Chapter 6: Diseases of the Nervous SystemG00-G99
- I.C.7Chapter 7: Diseases of the Eye and AdnexaH00-H59
- I.C.8Chapter 8: Diseases of the Ear and Mastoid ProcessH60-H95
- I.C.9Chapter 9: Diseases of the Circulatory SystemI00-I99
- I.C.10Chapter 10: Diseases of the Respiratory SystemJ00-J99
- I.C.11Chapter 11: Diseases of the Digestive SystemK00-K95
- I.C.12Chapter 12: Diseases of the Skin and Subcutaneous TissueL00-L99
- I.C.13Chapter 13: Diseases of the Musculoskeletal SystemM00-M99
- I.C.14Chapter 14: Diseases of the Genitourinary SystemN00-N99
- I.C.15Chapter 15: Pregnancy, Childbirth, and the PuerperiumO00-O9A
- I.C.16Chapter 16: Certain Conditions Originating in the Perinatal PeriodP00-P96
- I.C.17Chapter 17: Congenital MalformationsQ00-Q99
- I.C.18Chapter 18: Symptoms, Signs, and Abnormal FindingsR00-R99
- I.C.19Chapter 19: Injury, Poisoning, and Other External CausesS00-T88
- I.C.20Chapter 20: External Causes of MorbidityV00-Y99
- I.C.21Chapter 21: Factors Influencing Health StatusZ00-Z99
- I.C.22Chapter 22: Codes for Special PurposesU00-U85
These guidelines are approved by the Cooperating Parties: AHA, AHIMA, CMS, and NCHS. Source: CMS.gov