ICD-10 Code A21.0 – Ulceroglandular tularemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A21.0 – Ulceroglandular tularemia
What it is
Ulceroglandular tularemia is a form of tularemia caused by Francisella tularensis. It typically follows skin exposure and combines a localized skin ulcer with nearby lymph node swelling.
Clinical signs
Common findings include a painful or painless ulcer at the entry site and regional lymphadenopathy. Fever, malaise, and other nonspecific systemic symptoms may occur; clinical features vary, so refer to documentation.
When to use this code
Use A21.0 when the record clearly documents ulceroglandular tularemia or a clinician identifies this specific tularemia form. It fits cases with a cutaneous inoculation site plus associated regional gland involvement. Check documentation if the presentation is only suspected or if another tularemia type is named.
Do not use for
Do not use this code for other tularemia forms, such as oculoglandular, pneumonic, or typhoidal disease. Avoid it when the chart only notes exposure, nonspecific fever, or an undifferentiated skin infection.
Coding tip
Code A21.0 only when ulceroglandular tularemia is explicitly documented; otherwise, verify the subtype before assigning the code.