William Mustas P.A.
About this NPIWhat this record shows.
NPI 1629080932 is registered to William Mustas P.A., a Physician Assistant practising at 1111 Delafield St Ste 215 in Waukesha, Wisconsin. Physician Assistant is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. William Mustas P.A. has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Other
- 1703WI· Issued by LICENSE
Source: NPPES public registry.
Medicare enrollment
This provider holds 2 Medicare enrollments on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20200320002377Physician AssistantWI
- I20250212001475Physician AssistantNM
Source: CMS PECOS public enrollment file.
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 Mustas P.A. accepts. To confirm in-network status with your specific health plan, contact William Mustas P.A. directly at (262) 542-0074.
Frequently asked
Yes. NPI 1629080932 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Physician Assistant is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
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 (262) 542-0074.
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 Mustas P.A. is a Type-1 individual NPI.