G23.2: Striatonigral degeneration

Risk adjustment

G23.2 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

• HCC 199 Parkinson and Other Degenerative Disease of Basal Ganglia0.615 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

G23.2 is named in 10 Medicare coverage policies: 10 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

• A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
• A54954Billing and Coding: Autonomic Function Tests
• A56612Billing and Coding: CT of the Head
• A56619Billing and Coding: Nerve Conduction Studies and Electromyography