R50.2 vs R50.83
R50.2 (Drug induced fever) compared with R50.83 (Postvaccination fever), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. R50.2 carries an Excludes1 note covering R50.83: “postvaccination (postimmunization) fever (R50.83)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| R50.2Drug induced fever | R50.83Postvaccination fever | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Drug induced fever is a billable ICD-10-CM diagnosis code (R50.2). | Postvaccination fever is a billable ICD-10-CM diagnosis code (R50.83). |
| Includes | — | Postimmunization fever |
| Use additional code | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources