G93.0 Cerebral cysts

Billable ICD-10-CM code, FY2026.

Applicable to

• Arachnoid cyst
• Porencephalic cyst, acquired

Excludes1 (never code together)

• acquired periventricular cysts of newborn (P91.1)
• congenital cerebral cysts (Q04.6)

MS-DRG index

Defines the logic of DRG(s) 091-093 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 348.0 Cerebral cysts

Code annotations containing back-references to G93.0

Back-references to G93.0

• Type 1 Excludes: Q04.6 Congenital cerebral cysts ("acquired porencephalic cyst (G93.0)")

Diagnosis Index entries for G93.0

• Cyst (colloid) (mucous) (simple) (retention) › arachnoid, brain (acquired)
• Cyst (colloid) (mucous) (simple) (retention) › brain (acquired)
• Cyst (colloid) (mucous) (simple) (retention) › choroid plexus
• Cyst (colloid) (mucous) (simple) (retention) › corpora quadrigemina
• Cyst (colloid) (mucous) (simple) (retention) › cranial meninges
• Cyst (colloid) (mucous) (simple) (retention) › dura (cerebral)
• Cyst (colloid) (mucous) (simple) (retention) › membrane, brain
• Cyst (colloid) (mucous) (simple) (retention) › meninges (cerebral)
• Cyst (colloid) (mucous) (simple) (retention) › porencephalic › acquired
• Cyst (colloid) (mucous) (simple) (retention) › subdural (cerebral)
• Porencephaly (congenital) (developmental) (true) › acquired
• Porencephaly (congenital) (developmental) (true) › nondevelopmental

Nearby codes

• G93 Other disorders of brain
• G93.0 Cerebral cysts (this code)
• G93.1 Anoxic brain damage, not elsewhere classified
• G93.2 Benign intracranial hypertension
• G93.3 Postviral and related fatigue syndromes
• G93.31 Postviral fatigue syndrome
• G93.32 Myalgic encephalomyelitis/chronic fatigue syndrome