A21.0

What This Code Means

Ulceroglandular tularemia is a bacterial infection caused by Francisella tularensis that produces painful ulcers on the skin and swollen lymph nodes, typically acquired through contact with infected animals or contaminated water. It is the most common form of tularemia and can be treated with antibiotics if diagnosed early.

Coding Tips

• •Verify that the documentation specifically identifies ulceroglandular tularemia rather than other forms (typhoidal, pneumonic, oculoglandular, etc.), as each has a distinct ICD-10-CM code
• •Confirm the source of infection when documented (animal bite, tick exposure, contaminated water) as this may support medical necessity and clinical decision-making, though it is not required for code assignment