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U.S. ICD-10-CM reference · FY2026 · April

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ICD-10-CM · FY2026 · April / 11. Chapter 11: Diseases of the Digestive System (K00-K95)

Official coding guidelines

11. Chapter 11: Diseases of the Digestive System (K00-K95)

ICD-10-CM · FY2026 · April · Apr 1, 2026 – Sep 30, 2026

This is archived guidance for April 1 through September 30, 2026. For current encounters, read the FY2027 matching section, effective October 1, 2026 through September 30, 2027. Confirm the instructions in the current source before use.

Contents

ICD-10-CM Official Guidelines for Coding and Reporting Section I. Conventions, general coding guidelines and chapter specific guidelines A. Conventions for the ICD-10-CM B. General Coding Guidelines C. Chapter-Specific Coding Guidelines 1. Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99), U07.1, U09.9 2. Chapter 2: Neoplasms (C00-D49)3. Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)4. Chapter 4: Endocrine, Nutritional, and Metabolic Diseases (E00-E89)5. Chapter 5: Mental, Behavioral and Neurodevelopmental disorders (F01 – F99)6. Chapter 6: Diseases of the Nervous System (G00-G99)7. Chapter 7: Diseases of the Eye and Adnexa (H00-H59)8. Chapter 8: Diseases of the Ear and Mastoid Process (H60-H95)9. Chapter 9: Diseases of the Circulatory System (I00-I99)10. Chapter 10: Diseases of the Respiratory System (J00-J99), U07.0 11. Chapter 11: Diseases of the Digestive System (K00-K95)12. Chapter 12: Diseases of the Skin and Subcutaneous Tissue (L00-L99)13. Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)14. Chapter 14: Diseases of Genitourinary System (N00-N99)15. Chapter 15: Pregnancy, Childbirth, and the Puerperium (O00-O9A)16. Chapter 16: Certain Conditions Originating in the Perinatal Period (P00-P96)17. Chapter 17: Congenital malformations, deformations, and chromosomal abnormalities (Q00-QA0)18. Chapter 18: Symptoms, signs, and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)19. Chapter 19: Injury, poisoning, and certain other consequences of external causes (S00-T88)20. Chapter 20: External Causes of Morbidity (V00-Y99)21. Chapter 21: Factors influencing health status and contact with health services (Z00-Z99)22. Chapter 22: Codes for Special Purposes (U00-U85)Section II. Selection of Principal Diagnosis Section III. Reporting Additional Diagnoses Section IV. Diagnostic Coding and Reporting Guidelines for Outpatient Services Present on Admission Reporting Guidelines

Reserved for future guideline expansion

CDC/NCHS · CMS · pp. 58

10. Chapter 10: Diseases of the Respiratory System (J00-J99), U07.0 12. Chapter 12: Diseases of the Skin and Subcutaneous Tissue (L00-L99)

CDC / NCHS · ICD-10-CMApr 1, 2026 – Sep 30, 2026

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