Dr. Douglas Tollefsen MD
About this NPIWhat this record shows.
NPI 1679599815 is registered to Dr. Douglas Tollefsen MD, a Hematology (Internal Medicine) Physician practising at 4921 Parkview Pl Fl 7, 7th Fl in Saint Louis, Missouri. Hematology (Internal Medicine) Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. Douglas Tollefsen MD 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.
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. Douglas Tollefsen MD accepts. To confirm in-network status with your specific health plan, contact Dr. Douglas Tollefsen MD directly at (314) 362-8808.
Frequently asked
Yes. NPI 1679599815 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Hematology (Internal Medicine) 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 (314) 362-8808.
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. Douglas Tollefsen MD is a Type-1 individual NPI.