Quoc Nguyen, DO
NPI 1275611386 · Internal Medicine Physician · Antioch, CA
Quoc Nguyen, DO is a Internal Medicine Physician provider in Antioch, CA (NPI 1275611386).
Provider details
- NPI number
- 1275611386
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A6519 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 97 | 50 |
| Levothyroxine Sodium | 43 | 26 |
| Losartan Potassium | 35 | 23 |
| Amlodipine Besylate | 34 | 22 |
| Famotidine | 34 | 22 |
| Atenolol | 29 | 19 |
| Glipizide | 26 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$29 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2021-12-06
Frequently asked questions
- What is Quoc Nguyen's NPI number?
- Quoc Nguyen's National Provider Identifier (NPI) is 1275611386, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Quoc Nguyen's specialty?
- Quoc Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Quoc Nguyen located?
- Quoc Nguyen's practice location on file with NPPES is 5601 Deer Valley Rd, Antioch, CA 94531-8577.
- What is Quoc Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Quoc Nguyen is (925) 813-6500.
- Is Quoc Nguyen's NPI active?
- Yes — Quoc Nguyen's NPI (1275611386) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.