Loc Nguyen, MD
NPI 1962623462 · Internal Medicine Physician · Stockton, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Loc Nguyen, MD is a Internal Medicine Physician provider in Stockton, CA (NPI 1962623462).
Provider details
- NPI number
- 1962623462
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A133981 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
840 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 388 | $174 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 206 | $124 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 130 | $87 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 51 | $55 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 32 | $212 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 130 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,042 | 259 |
| Empagliflozinbrand: Jardiance | 1,016 | 108 |
| Fluticasone Propionate | 572 | 108 |
| Linagliptinbrand: Tradjenta | 538 | 59 |
| Losartan Potassium | 505 | 121 |
| Rosuvastatin Calcium | 414 | 99 |
| Sitagliptin Phosphate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$36 across 2 records (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
- 2007-05-01
- Last updated
- 2021-04-28
- Certified
- 2021-04-28
Frequently asked questions
- What is Loc Nguyen's NPI number?
- Loc Nguyen's National Provider Identifier (NPI) is 1962623462, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Loc Nguyen's specialty?
- Loc Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Loc Nguyen located?
- Loc Nguyen's practice location on file with NPPES is 4545 Georgetown Pl Ste C16, Stockton, CA 95207-6230.
- What is Loc Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Loc Nguyen is (209) 227-9297.
- Does Loc Nguyen accept Medicare?
- Loc Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Loc Nguyen's NPI active?
- Yes — Loc Nguyen's NPI (1962623462) is active in the NPPES registry as of the last update on 2021-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.