Retrovirus infections, not elsewhere classified

This code signifies an infection caused by a retrovirus that is not specifically categorized under other, more defined retroviral conditions. It represents a broad classification for retroviral diseases that lack a more precise ICD-10-CM code.

Use this code when documentation confirms a retroviral infection, but the specific type (e.g., HIV, HTLV) is not identified or a more specific code is unavailable. This code is appropriate when the medical record clearly states "retrovirus infection, not otherwise specified" or similar terminology.

• Do not use this code for HIV infections; use codes from B20 for confirmed HIV disease.
• Always seek clarification from the provider if a more specific retroviral infection is suspected but not documented.
• Consider sequencing this code after a code for the presenting symptoms or manifestations of the retroviral infection.