William Larsen
About this NPIWhat this record shows.
NPI 1356711584 is registered to William Larsen, a Medical Physician Assistant practising at 800 Biesterfield Rd in Elk Grove Village, Illinois. Medical Physician Assistant is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. William Larsen has been enumerated in the National Provider Identifier (NPI) registry since 2015.
Your brand here.
Medicare enrollment
This provider holds a Medicare enrollment 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
- I20151118000758Physician AssistantIL
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 Larsen accepts. To confirm in-network status with your specific health plan, contact William Larsen directly at (847) 437-5500.
Frequently asked
Yes. NPI 1356711584 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Medical 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 (847) 437-5500.
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 Larsen is a Type-1 individual NPI.