A43.9 Nocardiosis, 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)

• 039.9 Actinomycotic infection of unspecified site (approximate)

Diagnosis Index entries for A43.9

• Nocardiosis, nocardiasis

Nearby codes

• A43 Nocardiosis
• A43.0 Pulmonary nocardiosis
• A43.1 Cutaneous nocardiosis
• A43.8 Other forms of nocardiosis
• A43.9 Nocardiosis, unspecified (this code)