William G Sills MD PC
About this NPIWhat this record shows.
NPI 1437225158 is registered to William G Sills MD PC, a healthcare organisation classified as "Internal Medicine" and located at 1223 S Washington in Royal Oak, Michigan. The organisation's authorised official is William Sills. The organisation has been enumerated in the NPI registry since 2006.
Your brand here.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans William G Sills MD PC accepts. To confirm in-network status with your specific health plan, contact William G Sills MD PC directly at (248) 399-9083.
Frequently asked
Yes. NPI 1437225158 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (248) 399-9083.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. William G Sills MD PC is a Type-2 organisational NPI.