Tuan Nguyen, M.D.
NPI 1669644951 · Interventional Cardiology Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tuan Nguyen, M.D. is a Interventional Cardiology Physician provider in Fountain Valley, CA (NPI 1669644951).
Provider details
- NPI number
- 1669644951
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A129624 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
17,682 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 4,589 | $76 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,936 | $130 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 1,881 | $15 |
| Critical Care, First 30-74 Minutes99291 | 1,778 | $201 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 1,073 | $66 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 61 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 770 | 178 |
| Metoprolol Succinate | 664 | 223 |
| Losartan Potassium | 472 | 164 |
| Metoprolol Tartrate | 389 | 150 |
| Amlodipine Besylate | 361 | 151 |
| Atorvastatin Calcium | 332 | 119 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$388 across 16 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
- 2008-03-27
- Last updated
- 2025-01-20
- Certified
- 2025-01-20
Frequently asked questions
- What is Tuan Nguyen's NPI number?
- Tuan Nguyen's National Provider Identifier (NPI) is 1669644951, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tuan Nguyen's specialty?
- Tuan Nguyen is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Tuan Nguyen located?
- Tuan Nguyen's practice location on file with NPPES is 11180 Warner Ave Ste 457, Fountain Valley, CA 92708.
- What is Tuan Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Tuan Nguyen is (714) 486-2120.
- Does Tuan Nguyen accept Medicare?
- Tuan Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tuan Nguyen's NPI active?
- Yes — Tuan Nguyen's NPI (1669644951) is active in the NPPES registry as of the last update on 2025-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.