A77.9 Spotted fever, unspecified

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

Applicable to

• Tick-borne typhus NOS

MS-DRG index

Defines the logic of DRG(s) 867-869 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 082.0 Spotted fevers (approximate)

Diagnosis Index entries for A77.9

• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › spotted
• Infection, infected, infective (opportunistic) › typhus › tick-borne
• Rickettsiosis › tick-borne
• Spotted fever
• Typhus (fever) › tick-borne

Nearby codes

• A77.4 Ehrlichiosis
• A77.40 Ehrlichiosis, unspecified
• A77.41 Ehrlichiosis chaffeensis [E. chaffeensis]
• A77.49 Other ehrlichiosis
• A77.8 Other spotted fevers
• A77.9 Spotted fever, unspecified (this code)