Physician Profile
Gregory H. Tchejeyan, M.D., INC
Unclaimed ProfileAbout Dr. Tchejeyan
Gregory H. Tchejeyan, M.D., INC is a specialist based in Thousand Oaks, CA. Gregory is a 1994 graduate of University of Southern California Keck School of Medicine. According to Medicare claims data, Gregory cared for 2,750 Medicare patients across 21,059 services. The services billed most often include injection, methylprednisolone acetate, 1 mg, injection, mepivacaine hydrochloride, per 10 ml, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (805) 495-3687
- Email not available
Practice Locations
250 LOMBARD ST STE 1
Thousand Oaks, CA 91360
Procedures Most Often Billed to Medicare
21,059 services · 2,750 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
378 | More often than most peers in Specialist |
| Computer-assisted surgery for muscle and bone procedure | Procedure | 20985 |
70 | More often than most peers in Specialist |
| Repair of dislocating kneecap with realignment | Procedure | 27422 |
50 | |
| Repair of multiple hamstring tendons in leg | Procedure | 27391 |
50 | |
| Incision of knee joint for exploration, biopsy, or removal of foreign body | Procedure | 27331 |
50 | |
| Insertion of drug delivery implant into tissue | Procedure | 11981 |
50 | |
| Partial removal of shin bone | Procedure | 27640 |
49 | |
| Partial removal of thigh and/or lower leg bones | Procedure | 27360 |
48 | |
| Removal of kneecap | Procedure | 27350 |
43 | |
| Incision of back portion of knee joint capsule | Procedure | 27435 |
41 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other specialists in Thousand Oaks 8
Same specialty, same city.
Trained at University of Southern California Keck School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1994 at University of Southern California Keck School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Gregory H. Tchejeyan, M.D. specialize in?
Gregory H. Tchejeyan, M.D. is a specialist in Thousand Oaks, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Gregory H. Tchejeyan, M.D. located?
Gregory H. Tchejeyan, M.D. is listed at 250 Lombard St Ste 1, Thousand Oaks, CA 91360. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gregory H. Tchejeyan, M.D.'s phone number?
The number on file is (805) 495-3687. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Gregory H. Tchejeyan, M.D.'s NPI number?
Gregory H. Tchejeyan, M.D.'s National Provider Identifier is 1689668188. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Gregory H. Tchejeyan, M.D. train?
Gregory H. Tchejeyan, M.D. attended University of Southern California Keck School of Medicine, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How long has Gregory H. Tchejeyan, M.D. been practicing?
Gregory H. Tchejeyan, M.D. has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What does Gregory H. Tchejeyan, M.D. do most often?
According to Medicare billing data, Gregory H. Tchejeyan, M.D. performs procedures including aspiration and/or injection of fluid from large joint, computer-assisted surgery for muscle and bone procedure and repair of dislocating kneecap with realignment; reads or performs imaging such as x-ray of knee, 4 or more views and x-ray of hip, minimum of 4 views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Gregory H. Tchejeyan, M.D. confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory H. Tchejeyan, M.D.. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.