Razmik Thomassian, M.D.
NPI 1518351733 · Internal Medicine Physician · Duarte, CA
Razmik Thomassian, M.D. is a Internal Medicine Physician provider in Duarte, CA (NPI 1518351733).
Provider details
- NPI number
- 1518351733
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A152242 (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
11 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 · 3 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Celecoxib | 13 |
| Quetiapine Fumarate | 13 |
| Azithromycin | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-03-25
- Last updated
- 2022-12-19
- Certified
- 2022-12-19
Frequently asked questions
- What is Razmik Thomassian's NPI number?
- Razmik Thomassian's National Provider Identifier (NPI) is 1518351733, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Razmik Thomassian's specialty?
- Razmik Thomassian is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Razmik Thomassian located?
- Razmik Thomassian's practice location on file with NPPES is 1227 Buena Vista St Ste F, Duarte, CA 91010-2486.
- What is Razmik Thomassian's phone number?
- The practice phone number listed in the NPPES registry for Razmik Thomassian is (877) 254-4496.
- Is Razmik Thomassian's NPI active?
- Yes — Razmik Thomassian's NPI (1518351733) is active in the NPPES registry as of the last update on 2022-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.