A27.9 Leptospirosis, unspecified

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

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 100.9 Leptospirosis, unspecified

Diagnosis Index entries for A27.9

• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › mud
• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › swamp
• Infection, infected, infective (opportunistic) › Leptospira interrogans
• Leptospirosis

Nearby codes

• A27 Leptospirosis
• A27.0 Leptospirosis icterohemorrhagica
• A27.8 Other forms of leptospirosis
• A27.81 Aseptic meningitis in leptospirosis
• A27.89 Other forms of leptospirosis
• A27.9 Leptospirosis, unspecified (this code)