A21
A21 — Tularemia
Non-billable headerICD-10-CM
A21 is a non-billable header ICD-10-CM code for tularemia. It cannot be billed on its own: choose one of the more specific child codes below.
Includes
Conditions this code covers.
- deer-fly fever
- infection due to Francisella tularensis
- rabbit fever
Other codes that can never be billed with A21
These codes carry an Excludes1 note pointing at A21. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A21 alone.
- J17Pneumonia in diseases classified elsewhere
Risk adjustment
A21 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead A21
7 child codes. Green means billable.
Questions about A21
- Is A21 a billable ICD-10-CM code?
- No. A21 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does A21 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Certain zoonotic bacterial diseases (A20-A28).