ICD-10 Code for Rash
Also indexed as (toxic)
The ICD-10-CM code for rash is R21 — Rash and other nonspecific skin eruption. This is the code the Alphabetic Index gives for rash with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
Billable
Which rash code should you use?
The Alphabetic Index lists 11 codes under Rash. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| canker | A38.9 | Scarlet fever, uncomplicated | |
| diaper | L22 | Diaper dermatitis | |
| drug | L27.0 | Generalized skin eruption due to drugs and medicaments taken internally | |
| following immunization | T88.1 | Other complications following immunization, not elsewhere classified | not billable |
| heat | L74.0 | Miliaria rubra | |
| napkin | L22 | Diaper dermatitis | |
| pustular | L08.0 | Pyoderma | |
| rose | R21 | Rash and other nonspecific skin eruption | |
| scarlet | A38.9 | Scarlet fever, uncomplicated | |
| serum | T80.69 | Other serum reaction due to other serum | not billable |
| wandering tongue | K14.1 | Geographic tongue |
Rash drug
| contact | L25.1 | Unspecified contact dermatitis due to drugs in contact with skin |
Rash rose
| epidemic | B06.9 | Rubella without complication |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources