ICD-10-CM 2027
ICD-10 code for tick fever mountain
From the official ICD-10-CM alphabetic index entry “Mountain › tick fever”. Page updated September 29, 2026.
About coding tick fever mountain
The ICD-10-CM code for tick fever mountain is A93.2 (Colorado tick fever).
Within A93 (other arthropod-borne viral fevers, not elsewhere classified), A93.2 is specifically for Colorado tick fever. Related codes cover Oropouche virus disease (A93.0), Sandfly fever (A93.1) and other specified arthropod-borne viral fevers (A93.8).
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 865 (Viral Illness with MCC, relative weight 1.3485) and DRG 866 (Viral Illness without MCC, relative weight 0.8692), 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 tick fever mountain ICD-10 codes
What is the ICD-10 code for tick fever mountain?
- A93.2 — Colorado tick fever.
Is A93.2 billable?
- Yes. A93.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A93.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A93.2 as a principal diagnosis.
Is A93.2 a CC or MCC?
- A93.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.