A92.4 Rift Valley fever

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from A92 Other mosquito-borne viral fevers

Excludes1 (never code together)

• Ross River disease (B33.1)

MS-DRG index

Defines the logic of DRG(s) 865-866 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 066.3 Other mosquito-borne fever (approximate)

Diagnosis Index entries for A92.4

• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › Rift Valley (viral)

Nearby codes

• A92.3 West Nile virus infection
• A92.30 West Nile virus infection, unspecified
• A92.31 West Nile virus infection with encephalitis
• A92.32 West Nile virus infection with other neurologic manifestation
• A92.39 West Nile virus infection with other complications
• A92.4 Rift Valley fever (this code)
• A92.5 Zika virus disease
• A92.8 Other specified mosquito-borne viral fevers
• A92.9 Mosquito-borne viral fever, unspecified