B27
B27 — Infectious mononucleosis
Non-billable headerICD-10-CM
B27 is a non-billable header ICD-10-CM code for infectious mononucleosis. It cannot be billed on its own: choose one of the more specific child codes below.
Includes
Conditions this code covers.
- glandular fever
- monocytic angina
- Pfeiffer's disease
Other codes that can never be billed with B27
These codes carry an Excludes1 note pointing at B27. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B27 alone.
Risk adjustment
B27 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 B27
4 child codes. Green means billable.
Questions about B27
- Is B27 a billable ICD-10-CM code?
- No. B27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does B27 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Other viral diseases (B25-B34).