ICD-10 Code A21.1 – Oculoglandular tularemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A21.1 – Oculoglandular tularemia
What it is
A21.1 identifies oculoglandular tularemia, a form of tularemia that affects the eye and nearby lymph nodes. It usually reflects infection with Francisella tularensis after direct eye exposure.
Clinical signs
Typical findings include conjunctivitis, eye pain, redness, tearing, and swelling of regional lymph nodes, often preauricular. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents oculoglandular tularemia or tularemic conjunctivitis with associated glandular involvement. Apply it for confirmed or clinician-documented cases, not for nonspecific eye infection without evidence of tularemia. Check documentation if the site or form is unclear.
Do not use for
Do not use A21.1 for ordinary conjunctivitis, isolated lymphadenitis, or other tularemia forms without ocular involvement. If the chart does not support tularemia, choose a more specific diagnosis.
Coding tip
Code the documented tularemia form, and verify that eye involvement is explicitly stated before assigning A21.1.