ICD-10-CM 2027
ICD-10 code for disease or fever cat-scratch
From the official ICD-10-CM alphabetic index entry “Cat-scratch › disease or fever”. Page updated September 29, 2026.
About coding disease or fever cat-scratch
The ICD-10-CM code for disease or fever cat-scratch is A28.1 (Cat-scratch disease).
Within A28 (other zoonotic bacterial diseases, not elsewhere classified), A28.1 is specifically for Cat-scratch disease. Related codes cover Pasteurellosis (A28.0), Extraintestinal yersiniosis (A28.2), other specified zoonotic bacterial diseases, not elsewhere classified (A28.8) and zoonotic bacterial disease, unspecified (A28.9).
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 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444) and DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), 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 disease or fever cat-scratch ICD-10 codes
What is the ICD-10 code for disease or fever cat-scratch?
- A28.1 — Cat-scratch disease.
Is A28.1 billable?
- Yes. A28.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A28.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A28.1 as a principal diagnosis.
Is A28.1 a CC or MCC?
- A28.1 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.