David Diep, DO
NPI 1750651485 · Family Medicine Physician · Ontario, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Diep, DO is a Family Medicine Physician provider in Ontario, CA (NPI 1750651485).
Provider details
- NPI number
- 1750651485
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A12549 (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
14 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 · 96 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 409 | 206 |
| Amlodipine Besylate | 262 | 136 |
| Lisinopril | 235 | 114 |
| Losartan Potassium | 205 | 94 |
| Metformin Hcl | 194 | 85 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 193 | 46 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-01-11
- Last updated
- 2021-12-03
Frequently asked questions
- What is David Diep's NPI number?
- David Diep's National Provider Identifier (NPI) is 1750651485, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Diep's specialty?
- David Diep is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Diep located?
- David Diep's practice location on file with NPPES is 2295 S Vineyard Ave, Ontario, CA 91761-7925.
- What is David Diep's phone number?
- The practice phone number listed in the NPPES registry for David Diep is (713) 835-6235.
- Does David Diep accept Medicare?
- David Diep is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Diep's NPI active?
- Yes — David Diep's NPI (1750651485) is active in the NPPES registry as of the last update on 2021-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.