ICD-10-CM 2027
ICD-10 code for Enteric tularemia
From the official ICD-10-CM alphabetic index entry “Tularemia › enteric”. Page updated September 29, 2026.
About coding Enteric tularemia
The ICD-10-CM code for Enteric tularemia is A21.3 (Gastrointestinal tularemia).
Within A21 (tularemia), A21.3 is specifically for gastrointestinal tularemia. Related codes cover Ulceroglandular tularemia (A21.0), Oculoglandular tularemia (A21.1), pulmonary tularemia (A21.2), generalized tularemia (A21.7), other forms of tularemia (A21.8) and unspecified (A21.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 371 (Major Gastrointestinal Disorders and Peritoneal Infections with MCC, relative weight 1.7089), DRG 372 (Major Gastrointestinal Disorders and Peritoneal Infections with CC, relative weight 0.9964) and DRG 373 (Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC, relative weight 0.6941), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Enteric tularemia ICD-10 codes
What is the ICD-10 code for Enteric tularemia?
- A21.3 — Gastrointestinal tularemia.
Is A21.3 billable?
- Yes. A21.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A21.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A21.3 as a principal diagnosis.
Is A21.3 a CC or MCC?
- A21.3 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.