A77.3 Spotted fever due to Rickettsia australis

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

Applicable to

• Queensland tick typhus

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 082.3 Queensland tick typhus

Diagnosis Index entries for A77.3

• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › Queensland (coastal) (tick)
• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › spotted › due to Rickettsia › australis
• Queensland fever
• Typhus (fever) › Queensland tick

Nearby codes

• A77 Spotted fever [tick-borne rickettsioses]
• A77.0 Spotted fever due to Rickettsia rickettsii
• A77.1 Spotted fever due to Rickettsia conorii
• A77.2 Spotted fever due to Rickettsia siberica
• A77.3 Spotted fever due to Rickettsia australis (this code)
• A77.4 Ehrlichiosis
• A77.40 Ehrlichiosis, unspecified
• A77.41 Ehrlichiosis chaffeensis [E. chaffeensis]
• A77.49 Other ehrlichiosis
• A77.8 Other spotted fevers