ICD-10-CM 2027
ICD-10 code for dengue
From the official ICD-10-CM alphabetic index entry “Dengue (classical) (fever)”. Page updated September 29, 2026.
About coding dengue
The ICD-10-CM code for dengue is A90 (Dengue fever [classical dengue]). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on A90.
Don't report A90 together with the conditions in its Excludes1 note: dengue hemorrhagic fever (A91).
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.
More specific dengue codes (official index)
Don't confuse with (Excludes1 for A90)
- dengue hemorrhagic fever (A91)
Common questions about dengue ICD-10 codes
What is the ICD-10 code for dengue?
- A90 — Dengue fever [classical dengue]. More specific codes apply when the documentation supports them: A91, A93.1.
What is the ICD-10 code for hemorrhagic dengue?
- A91 — Dengue hemorrhagic fever.
What is the ICD-10 code for sandfly dengue?
- A93.1 — Sandfly fever.
Is A90 billable?
- Yes. A90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A90 as a principal diagnosis.
Is A90 a CC or MCC?
- A90 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.