MCMedicalCodingSoftware
B99

B99: Other and unspecified infectious diseases

Non-billable headerICD-10-CM

B99 is a non-billable header ICD-10-CM code for other and unspecified infectious diseases. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Arthropathy›postinfectious NEC
  • Pneumonia›postinfectional NEC
  • Conjunctivitis NOS›in›infectious disease NEC
  • Encephalitis›in›infectious disease NEC
  • Iridocyclitis›in›infectious disease NOS
  • Mastoiditis›in›infectious disease NEC
  • Myopathy›in›infectious disease NEC
  • Neuritis›acoustic›in›infectious disease NEC
  • Otitis›externa›in›infectious disease NEC
  • Polyneuropathy›in›infectious›disease NEC
  • Palsy›cranial nerve›multiple›in›infectious disease

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead B99

2 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.