B99
Other and unspecified infectious diseases
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This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
diseases generally recognized as communicable or transmissible
certain localized infections - see body system-related chapters
carrier or suspected carrier of infectious disease (Z22.-) infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) infectious and parasitic diseases specific to the perinatal period (P35-P39) influenza and other acute respiratory infections (J00-J22)
code to identify resistance to antimicrobial drugs (Z16.-)
Official Guidelines for B99
FY 2026 ›Subsections
- I.C.1.aHuman Immunodeficiency Virus (HIV) Infections
- I.C.1.bInfectious agents as the cause of diseases classified to other chapters
- I.C.1.cInfections resistant to antibiotics
- I.C.1.dSepsis, Severe Sepsis, and Septic Shock Infections resistant to antibiotics
- I.C.1.eMethicillin Resistant Staphylococcus aureus (MRSA) Conditions
- I.C.1.fZika virus infections
- I.C.1.gCoronavirus infections
Find B99 in the alphabetic index
11 index paths lead to this code
- 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