A79.81 Rickettsiosis due to Ehrlichia sennetsu

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

Applicable to

• Rickettsiosis due to Neorickettsia sennetsu

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 083.8 Other specified rickettsioses (approximate)

Code annotations containing back-references to A79.81

Back-references to A79.81

• Type 1 Excludes: A75 Typhus fever ("rickettsiosis due to Ehrlichia sennetsu (A79.81)")
• Type 1 Excludes: A77.4 Ehrlichiosis ("rickettsiosis due to Ehrlichia sennetsu (A79.81)")

Diagnosis Index entries for A79.81

• Ehrlichiosis › due to › E. sennetsu
• Rickettsiosis › due to › Ehrlichia sennetsu
• Rickettsiosis › due to › Neorickettsia sennetsu

Nearby codes

• A79 Other rickettsioses
• A79.0 Trench fever
• A79.1 Rickettsialpox due to Rickettsia akari
• A79.8 Other specified rickettsioses
• A79.81 Rickettsiosis due to Ehrlichia sennetsu (this code)
• A79.82 Anaplasmosis [A. phagocytophilum]
• A79.89 Other specified rickettsioses
• A79.9 Rickettsiosis, unspecified