Mary Margaret Knudson MD
About this NPIWhat this record shows.
NPI 1912946674 is registered to Mary Margaret Knudson MD, a Surgery practising at 1001 Potrero Avenue, Rm 3a37 in San Francisco, California. Surgery is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Mary Margaret Knudson MD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Beyond the registryWhat this record adds.
This record carries 1 secondary identifier 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 4,174 Surgery providers on file in California.
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.
Medicaid
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 Mary Margaret Knudson MD accepts. To confirm in-network status with your specific health plan, contact Mary Margaret Knudson MD directly at (415) 206-4634.
Frequently asked
Yes. NPI 1912946674 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Surgery 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 (415) 206-4634.
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. Mary Margaret Knudson MD is a Type-1 individual NPI.
As of the latest monthly CMS NPPES snapshot, 4,174 Surgery providers are registered in California, and Mary Margaret Knudson MD is one of them. The figure refreshes each month from the federal source.