ICD-10-CM Alphabetic Index · FY 2027 9 Entries

Rectosigmoiditis in the ICD-10-CM Index ICD-10-CM

The main term Rectosigmoiditis carries 9 index entries pointing to 8 ICD-10-CM codes. The default entry is K63.89, 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 2027 index fileEffective Oct 1, 2026 – Sep 30, 2027
9
Index Entries
8
Codes Referenced
K63.89
Default Code
R
Letter
9 of 9 shown
ICD-10-CM

Index Entries Under Rectosigmoiditis 9 entries · 8 codes

Rectosigmoiditis K63.89
ulcerative (chronic) K51.30
with
complication K51.319
abscess K51.314
fistula K51.313
obstruction K51.312
rectal bleeding K51.311
specified NEC K51.318

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Related Index Terms

All index terms starting with RIndex to Diseases and InjuriesICD-10-CM Code Lookup

Source: Centers for Medicare & Medicaid Services, FY 2027 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2026 through September 30, 2027.