Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Gregory H. Tchejeyan, MD, INC

Individual provider Specialist · NPI 1689668188

Gregory H. Tchejeyan, MD, INC is an Orthopedic Surgery in Thousand Oaks, California. Graduated from University of Southern California Keck School of Medicine in 1994, 32 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
32
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

250 Lombard St Ste 1
Thousand Oaks, CA 91360-8208
Phone: (805) 495-3687
Fax: (805) 494-1828
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence A55364 (CA)

Record details

NPI number1689668188
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , INC
Sole proprietorYes
NPI enumeratedSeptember 12, 2005
Last updated in NPPESMarch 29, 2022
Certification dateMarch 29, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1994 (32 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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