Dr. William Fischer M.D.
About this NPIWhat this record shows.
NPI 1275791907 is registered to Dr. William Fischer M.D., a Radiation Oncology Physician practising at 617 S Washington St in Hinsdale, Illinois. Radiation Oncology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. William Fischer M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2008.
Beyond the registryWhat this record adds.
This record carries 3 secondary identifiers beyond the base NPI: Medicaid and other payer cross-references used by billers and credentialers, which the standard CMS NPPES lookup does not surface. Within the directory it is one of 341 Radiation Oncology Physician providers on file in Illinois.
Source: CMS NPPES and PECOS public files. snapshot, refreshed monthly.
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
- AF5361287· Issued by BNDD
- 336-044063IL· Issued by PHYSICIAN
- 336-011397IL· Issued by CONTROLLED SUBSTANCE
Source: NPPES public registry.
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 Dr. William Fischer M.D. accepts. To confirm in-network status with your specific health plan, contact Dr. William Fischer M.D. directly at (630) 325-7814.
Frequently asked
Yes. NPI 1275791907 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Radiation Oncology Physician 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 (630) 325-7814.
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. Dr. William Fischer M.D. is a Type-1 individual NPI.
As of the latest monthly CMS NPPES snapshot, 341 Radiation Oncology Physician providers are registered in Illinois, and Dr. William Fischer M.D. is one of them. The figure refreshes each month from the federal source.