B99 Other and unspecified infectious diseases
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The ICD-10-CM code for Other and unspecified infectious diseases is B99 (FY2026). It is a non-billable category code — select a more specific code below for claims.
Classification
- Section
- B99: Other infectious diseases (B99)
- Category B99
- 3 codes (2 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to B99:
- Arthropathy › postinfectious NEC
- Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › postinfectional NEC
- Conjunctivitis (staphylococcal) (streptococcal) NOS › in (due to) › infectious disease NEC
- Mastoiditis (coalescent) (hemorrhagic) (suppurative) › in (due to) › infectious disease NEC
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › in (due to) › infectious disease NEC
- Iridocyclitis › in (due to) › infectious disease NOS
- Myopathy › in (due to) › infectious disease NEC
- Otitis (acute) › externa › in (due to) › infectious disease NEC
Official Coding Guidelines
Chapter 1 TOC entry1. Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99), U07.1, U09.9 ................... 19
HIV Infections (TOC entry)a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026
References
Cite This Page
Reference B99 with the canonical source and edition:
B99 — Other and unspecified infectious diseases. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/B99
Canonical URL: https://icd10codingpro.com/codes/B99