ICD-10-CM Alphabetic Index · FY 2026 12 Entries
Megacolon in the ICD-10-CM Index ICD-10-CM
The main term Megacolon (acquired) (functional) (not Hirschsprung's disease) (in) carries 12 index entries pointing to 6 ICD-10-CM codes. The default entry is K59.39, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
12
Index Entries
6
Codes Referenced
K59.39
Default Code
M
Letter
12 of 12 shown
ICD-10-CM
Index Entries Under Megacolon 12 entries · 6 codes
Megacolon (acquired) (functional) (not Hirschsprung's disease) (in) K59.39
Chagas' disease B57.32
congenital, congenitum (aganglionic) Q43.1
Hirschsprung's (disease) Q43.1
toxic NEC K59.31
due to
Clostridioides difficile
not specified as recurrent A04.72
recurrent A04.71
Clostridium difficile
not specified as recurrent A04.72
recurrent A04.71
The info icon previews the code's description and billable status; the code link opens its full page with all notations.
Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
