Grigor Matentsian, MD
NPI 1255402152 · Family Medicine Physician · Bellflower, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grigor Matentsian, MD is a Family Medicine Physician provider in Bellflower, CA (NPI 1255402152).
Provider details
- NPI number
- 1255402152
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A77207 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 71 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 727 | 308 |
| Losartan Potassium | 473 | 183 |
| Metformin Hcl | 316 | 127 |
| Amlodipine Besylate | 295 | 125 |
| Tamsulosin Hcl | 193 | 92 |
| Omeprazole | 176 | 90 |
| Glipizide | 170 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-13
- Last updated
- 2021-11-22
Frequently asked questions
- What is Grigor Matentsian's NPI number?
- Grigor Matentsian's National Provider Identifier (NPI) is 1255402152, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grigor Matentsian's specialty?
- Grigor Matentsian is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grigor Matentsian located?
- Grigor Matentsian's practice location on file with NPPES is 9400 Rosecrans Ave, Bellflower, CA 90706-2246.
- What is Grigor Matentsian's phone number?
- The practice phone number listed in the NPPES registry for Grigor Matentsian is (562) 461-3000.
- Does Grigor Matentsian accept Medicare?
- Grigor Matentsian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grigor Matentsian's NPI active?
- Yes — Grigor Matentsian's NPI (1255402152) is active in the NPPES registry as of the last update on 2021-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.