A43.0 Pulmonary nocardiosis

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

Risk adjustment (HCC)

• CMS-HCC V22: HCC 115 — Pneumococcal Pneumonia, Empyema, Lung Abscess
• ESRD V24: HCC 115

MS-DRG index

Defines the logic of DRG(s) 177-179 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 039.1 Pulmonary actinomycotic infection (approximate)

Code annotations containing back-references to A43.0

Back-references to A43.0

• Type 1 Excludes: J17 Pneumonia in diseases classified elsewhere ("nocardiosis pneumonia (A43.0)")

Diagnosis Index entries for A43.0

• Nocardiosis, nocardiasis › lung
• Nocardiosis, nocardiasis › pneumonia
• Nocardiosis, nocardiasis › pulmonary
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › in (due to) › nocardiosis, nocardiasis

Nearby codes

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