B99 is the authoritative medical code for Other and unspecified infectious diseases. This classification is used in medical billing and clinical recording to specify the clinical criteria for other and unspecified infectious diseases (ICD-10-CM B99), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Other and unspecified infectious diseases is a non-billable ICD-10-CM category code B99. A more specific billable subcode must be selected for claims submission.
Frequently Asked Questions (FAQ) & Clinical Guidance
Can B99 be billed directly?
No. B99 (Other and unspecified infectious diseases) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Codes in This Family (2)
Official ICD-10-CM classifications in the same code family as B99, with their registry titles.
- B99.8 — Other infectious disease
- B99.9 — Unspecified infectious disease
Indexed Clinical Terms (11)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Arthropathy, postinfectious NEC
- Conjunctivitis NOS (staphylococcal) (streptococcal), 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
- Mastoiditis (coalescent) (hemorrhagic) (suppurative), in (due to), infectious disease NEC
- Myopathy, in (due to), infectious disease NEC
- Neuritis (rheumatoid), acoustic (nerve), in (due to), infectious disease NEC
- Otitis (acute), externa, in (due to), infectious disease NEC
- Palsy, cranial nerve, multiple, in, infectious disease
- Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), postinfectional NEC
- Polyneuropathy (peripheral), in (due to), infectious, disease NEC
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code B94
Sequelae of other and unspecified infectious and parasitic diseases
ICD Code B95
Streptococcus, Staphylococcus, and Enterococcus as the cause of diseases classified elsewhere
ICD Code B96
Other bacterial agents as the cause of diseases classified elsewhere
ICD Code B97
Viral agents as the cause of diseases classified elsewhere