G20.A2: Parkinson's disease without dyskinesia, with fluctuations

Risk adjustment

G20.A2 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

G20.A2 is named in 24 Medicare coverage policies: 24 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

• A52507External Infusion Pumps - Policy Article
• A53064Billing and Coding: Outpatient Occupational Therapy
• A53065Billing and Coding: Outpatient Physical Therapy
• A54095Billing and Coding: Nerve Conduction Studies and Electromyography