Thanh Nguyen, M.D.
NPI 1346419918 · Nephrology Physician · Merced, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thanh Nguyen, M.D. is a Nephrology Physician provider in Merced, CA (NPI 1346419918).
Provider details
- NPI number
- 1346419918
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A86202 (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
18 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
2,473 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 664 | $94 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 658 | $49 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 516 | $355 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 200 | $132 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 118 | $79 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 244 | 91 |
| Losartan Potassium | 157 | 53 |
| Chlorthalidone | 145 | 51 |
| Nifedipinebrand: Nifedipine Er | 123 | 43 |
| Valsartan | 106 | 31 |
| Furosemide | 90 | 42 |
| Hydralazine Hcl | 81 | 28 |
| Empagliflozin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$80 across 3 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
- 2008-02-27
- Last updated
- 2013-09-17
Frequently asked questions
- What is Thanh Nguyen's NPI number?
- Thanh Nguyen's National Provider Identifier (NPI) is 1346419918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thanh Nguyen's specialty?
- Thanh Nguyen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Thanh Nguyen located?
- Thanh Nguyen's practice location on file with NPPES is 3393 G St, Merced, CA 95340-0964.
- What is Thanh Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Thanh Nguyen is (209) 230-9065.
- Does Thanh Nguyen accept Medicare?
- Thanh Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thanh Nguyen's NPI active?
- Yes — Thanh Nguyen's NPI (1346419918) is active in the NPPES registry as of the last update on 2013-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.