ICD-10-CM 2027
ICD-10 code for foramen magnum syndrome
From the official ICD-10-CM alphabetic index entry “Syndrome › foramen magnum”. Page updated September 29, 2026.
About coding foramen magnum syndrome
The ICD-10-CM code for foramen magnum syndrome is G93.5 (Compression of brain).
Within G93 (other disorders of brain), G93.5 is specifically for compression of brain. Related codes cover cerebral cysts (G93.0), Anoxic brain damage, not elsewhere classified (G93.1), benign intracranial hypertension (G93.2), Postviral and related fatigue syndromes (G93.3), other and unspecified encephalopathy (G93.4), cerebral edema (G93.6), Reye's syndrome (G93.7), other specified disorders of brain (G93.8) and 1 more.
Don't report G93.5 together with the conditions in its Excludes1 note: traumatic compression of brain (S06.A-).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
Don't confuse with (Excludes1 for G93.5)
- traumatic compression of brain (S06.A-)
Common questions about foramen magnum syndrome ICD-10 codes
What is the ICD-10 code for foramen magnum syndrome?
- G93.5 — Compression of brain.
Is G93.5 billable?
- Yes. G93.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G93.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G93.5 as a principal diagnosis.
Is G93.5 a CC or MCC?
- G93.5 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.