A36.9 Diphtheria, 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)

• 032.9 Diphtheria, unspecified

Diagnosis Index entries for A36.9

• Diphtheria, diphtheritic (gangrenous) (hemorrhagic)

Nearby codes

• A36.83 Diphtheritic polyneuritis
• A36.84 Diphtheritic tubulo-interstitial nephropathy
• A36.85 Diphtheritic cystitis
• A36.86 Diphtheritic conjunctivitis
• A36.89 Other diphtheritic complications
• A36.9 Diphtheria, unspecified (this code)