NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Tamara Kay Oser, MD

Family Medicine Physician in Aurora, CO · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1265437594

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Tamara Kay Oser
Credential MD
Sex Female
Practice address 12605 E 16th Ave, Aurora, CO, 80045
Enumeration date Jun 14, 2005
Last updated in NPPES Aug 26, 2019

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License DR.0062664 (CO) Primary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD421711 (PA) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Tamara Oser?
The National Provider Identifier (NPI) for Tamara Oser is 1265437594, a Type 1 (individual) record in the CMS NPPES registry.
Where does Tamara Oser practice?
The practice location on file with NPPES is in Aurora, CO. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-26.