B58.3 Pulmonary toxoplasmosis

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

Applies from B58 Toxoplasmosis

Includes

• infection due to Toxoplasma gondii

Excludes1 (never code together)

• congenital toxoplasmosis (P37.1)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 6 — Opportunistic Infections
• CMS-HCC V22: HCC 6 — Opportunistic Infections
• RxHCC V08: HCC 5 — Opportunistic Infections
• ESRD V24: HCC 6

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 130.4 Pneumonitis due to toxoplasmosis (approximate)

Code annotations containing back-references to B58.3

Back-references to B58.3

• Type 1 Excludes: J17 Pneumonia in diseases classified elsewhere ("pneumonia in toxoplasmosis (B58.3)")

Back-references to B58

• Type 2 Excludes: J82 Pulmonary eosinophilia, not elsewhere classified ("pulmonary eosinophilia due to specified parasitic infection (B50-B83)")

Diagnosis Index entries for B58.3

• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › in (due to) › toxoplasmosis
• Pneumonitis (acute) (primary) › due to › toxoplasmosis (acquired)
• Toxoplasma, toxoplasmosis (acquired) › with › pneumonia, pneumonitis

Nearby codes

• B58.00 Toxoplasma oculopathy, unspecified
• B58.01 Toxoplasma chorioretinitis
• B58.09 Other toxoplasma oculopathy
• B58.1 Toxoplasma hepatitis
• B58.2 Toxoplasma meningoencephalitis
• B58.3 Pulmonary toxoplasmosis (this code)
• B58.8 Toxoplasmosis with other organ involvement
• B58.81 Toxoplasma myocarditis
• B58.82 Toxoplasma myositis
• B58.83 Toxoplasma tubulo-interstitial nephropathy
• B58.89 Toxoplasmosis with other organ involvement