Nassim Assefi MD
About this NPIWhat this record shows.
NPI 1558441055 is registered to Nassim Assefi MD, a Internal Medicine practising at 2101 E Yesler Way, Suite 210 in Seattle, Washington. Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties. Nassim Assefi 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 3,424 Internal Medicine providers on file in Washington.
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
- 8263766WA
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 Nassim Assefi MD accepts. To confirm in-network status with your specific health plan, contact Nassim Assefi MD directly at (206) 299-1937.
Frequently asked
Yes. NPI 1558441055 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties.
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 (206) 299-1937.
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. Nassim Assefi MD is a Type-1 individual NPI.
As of the latest monthly CMS NPPES snapshot, 3,424 Internal Medicine providers are registered in Washington, and Nassim Assefi MD is one of them. The figure refreshes each month from the federal source.