Hoang Nguyen, M.D.
NPI 1457329179 · Internal Medicine Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hoang Nguyen, M.D. is a Internal Medicine Physician provider in Fountain Valley, CA (NPI 1457329179).
Provider details
- NPI number
- 1457329179
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A80321 (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
20 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
20,758 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 3,410 | $119 |
| Therapy Procedure to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112 | 2,611 | $32 |
| Therapy Procedure Using Manual Technique, Each 15 Minutes97140 | 1,702 | $21 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 1,701 | $23 |
| Review By Radiologist of Knee Joint Image73580 | 1,139 | $120 |
| Fluoroscopic Guidance for Needle Placement77002 | 1,139 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 178 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levocetirizine Dihydrochloride | 1,394 | 535 |
| Montelukast Sodium | 1,258 | 484 |
| Atorvastatin Calcium | 1,105 | 349 |
| Rosuvastatin Calcium | 1,101 | 336 |
| Amlodipine Besylate | 1,050 | 320 |
| Losartan Potassium | 1,014 | 305 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$287 across 7 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
- 2006-03-09
- Last updated
- 2018-10-05
Frequently asked questions
- What is Hoang Nguyen's NPI number?
- Hoang Nguyen's National Provider Identifier (NPI) is 1457329179, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hoang Nguyen's specialty?
- Hoang Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hoang Nguyen located?
- Hoang Nguyen's practice location on file with NPPES is 16040 Harbor Blvd, Fountain Valley, CA 92708-1327.
- What is Hoang Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Hoang Nguyen is (714) 531-7930.
- Does Hoang Nguyen accept Medicare?
- Hoang Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hoang Nguyen's NPI active?
- Yes — Hoang Nguyen's NPI (1457329179) is active in the NPPES registry as of the last update on 2018-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.