A21Header code — not billable

Tularemia

Chapter
1. Certain infectious and parasitic diseases
Category
A21
Effective date
October 1, 2026

Related codes in category A21

A21.0Ulceroglandular tularemiaYesA21.1Oculoglandular tularemiaYesA21.2Pulmonary tularemiaYesA21.3Gastrointestinal tularemiaYesA21.7Generalized tularemiaYesA21.8Other forms of tularemiaYesA21.9Tularemia, unspecifiedYes

Frequently asked questions

What is ICD-10 code A21?

A21 is an ICD-10-CM diagnosis code for Tularemia.

Is A21 a billable code?

No. A21 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is A21 in?

A21 falls under Chapter 1: Certain infectious and parasitic diseases.

When did A21 become effective?

A21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to A21?

A21 belongs to category A21, which includes 7 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.