ICD-10-CM 2027
ICD-10 code for sepsis anthrax
From the official ICD-10-CM alphabetic index entry “Anthrax › sepsis”. Page updated September 29, 2026.
About coding sepsis anthrax
The ICD-10-CM code for sepsis anthrax is A22.7 (Anthrax sepsis).
Within A22 (anthrax), A22.7 is specifically for anthrax sepsis. Related codes cover cutaneous anthrax (A22.0), pulmonary anthrax (A22.1), gastrointestinal anthrax (A22.2), other forms of anthrax (A22.8) and unspecified (A22.9).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" 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 870 (Septicemia or Severe Sepsis with MV >96 Hours, relative weight 6.9408), DRG 871 (Septicemia or Severe Sepsis without MV >96 Hours with MCC, relative weight 1.932) and DRG 872 (Septicemia or Severe Sepsis without MV >96 Hours without MCC, relative weight 1.0066), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), 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 sepsis anthrax ICD-10 codes
What is the ICD-10 code for sepsis anthrax?
- A22.7 — Anthrax sepsis.
Is A22.7 billable?
- Yes. A22.7 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A22.7 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A22.7 as a principal diagnosis.
Is A22.7 a CC or MCC?
- A22.7 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.