P91.1

Billable

Acquired periventricular cysts of newborn

HCC Category Mapping

V28HCC 202 — Coma, Brain Compression/Anoxic Damage

0.000

What This Code Means

Fluid-filled cavities that develop in the brain tissue around the ventricles in newborns, often detected on imaging studies.

Coding Tips

•Document whether cysts are unilateral or bilateral and their location within the periventricular region
•Correlate with imaging reports (ultrasound or MRI) to confirm the diagnosis and document the clinical significance

Clinical Significance

Acquired periventricular cysts in newborns indicate brain tissue damage around the ventricles, often resulting from hypoxic-ischemic injury. This diagnosis signals increased risk for cerebral palsy, developmental delays, and long-term neurological disabilities requiring multidisciplinary care.

Documentation Requirements

✓Neuroimaging documentation of periventricular cysts
✓Evidence that cysts were acquired postnatally, not congenital
✓Location and size of cystic lesions documented
✓Associated clinical findings and neurological examination
✓Underlying etiology identified (hypoxia, infection, hemorrhage)
✓Serial imaging showing cyst development or progression
✓Impact on surrounding brain tissue
✓Developmental assessments and functional outcomes

Commonly Confused Codes

Q04.6 — Congenital cerebral cysts, present from birth vs acquired P91.2 — Neonatal cerebral leukomalacia, white matter softening vs cyst formation G93.0 — Cerebral cysts, not neonatal-specific P52.22 — Intraventricular hemorrhage with ventricular dilatation

Code Hierarchy

└P91Other disturbances of cerebral status of newborn └P91.1Acquired periventricular cysts of newborn

└P91.1Acquired periventricular cysts of newborn