G91.0: Communicating hydrocephalus
G91.0 is a billable, specific ICD-10-CM code for communicating hydrocephalus. It is valid for submission on a claim.
Check G91.0 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Secondary normal pressure hydrocephalus
Other codes that can never be billed with G91.0
Their own Excludes1 notes name this code, so the conflict is not listed above.
- Q03Congenital hydrocephalus
Risk adjustment
G91.0 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 127 Dementia, Mild or Unspecified0.341 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
G91.0 is named in 4 Medicare coverage policies: 4 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
- A56612Billing and Coding: CT of the Head
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A57780Billing and Coding: Psychological and Neuropsychological Tests
Alphabetic index entries that lead here
- Hydrocephalus›communicating
- Hydrocephalus›normal pressure›secondary
Code history
Unchanged in every release from FY2024 to FY2027.