P91.821 Neonatal cerebral infarction, right side of brain

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Applies from P91.82 Neonatal cerebral infarction

Applicable to

• Neonatal stroke
• Perinatal arterial ischemic stroke
• Perinatal cerebral infarction

Excludes1 (never code together)

• cerebral infarction (I63.-)

Excludes2 (not included here)

• intracranial hemorrhage of newborn (P52.-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 249 — Ischemic or Unspecified Stroke
• CMS-HCC V22: HCC 100 — Ischemic or Unspecified Stroke
• ESRD V24: HCC 100

MS-DRG index

Defines the logic of DRG(s) 791 in MDC 15.

Code annotations containing back-references to P91.821

Back-references to P91.82

• Type 1 Excludes: I63 Cerebral infarction ("neonatal cerebral infarction (P91.82-)")
• Type 1 Excludes: P91.0 Neonatal cerebral ischemia ("Neonatal cerebral infarction (P91.82-)")

Nearby codes

• P91.8 Other specified disturbances of cerebral status of newborn
• P91.81 Neonatal encephalopathy
• P91.811 Neonatal encephalopathy in diseases classified elsewhere
• P91.819 Neonatal encephalopathy, unspecified
• P91.82 Neonatal cerebral infarction
• P91.821 Neonatal cerebral infarction, right side of brain (this code)
• P91.822 Neonatal cerebral infarction, left side of brain
• P91.823 Neonatal cerebral infarction, bilateral
• P91.829 Neonatal cerebral infarction, unspecified side
• P91.88 Other specified disturbances of cerebral status of newborn
• P91.9 Disturbance of cerebral status of newborn, unspecified