ICD-10-CM Alphabetic Index · FY 2026 16 Entries
Rash in the ICD-10-CM Index ICD-10-CM
The main term Rash (toxic) carries 16 index entries pointing to 11 ICD-10-CM codes. The default entry is R21, 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
16
Index Entries
11
Codes Referenced
R21
Default Code
R
Letter
16 of 16 shown
ICD-10-CM
Index Entries Under Rash 16 entries · 11 codes
Rash (toxic) R21
canker A38.9
diaper L22
drug (internal use) L27.0
contact L25.1 see also Dermatitis, due to, drugs, external
following immunization T88.1 Non-billable
food see Dermatitis, due to, food
heat L74.0
napkin (psoriasiform) L22
nettle see Urticaria
pustular L08.0
rose R21
epidemic B06.9
scarlet A38.9
wandering tongue K14.1
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.
