Hoa Nguyen, M.D
NPI 1619931763 · Internal Medicine Physician · Westminster, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hoa Nguyen, M.D is a Internal Medicine Physician provider in Westminster, CA (NPI 1619931763).
Provider details
- NPI number
- 1619931763
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- Yes
- License
- G58722 (CA)
Specialties & taxonomies
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
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
376 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 | 241 | $99 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 64 | $120 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 28 | $136 |
| Diagnostic Exam of Large Bowel Using a Flexible Endoscope45378 | 25 | $190 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 18 | $207 |
Typical Medicare-allowed amounts for these services range $99–$207 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
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 |
|---|---|---|
| Atorvastatin Calcium | 240 | 64 |
| Losartan Potassium | 200 | 54 |
| Amlodipine Besylate | 173 | 50 |
| Montelukast Sodium | 135 | 51 |
| Metformin Hcl | 125 | 36 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 87 | 87 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$595 across 9 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
- 2006-04-14
- Last updated
- 2023-03-07
Frequently asked questions
- What is Hoa Nguyen's NPI number?
- Hoa Nguyen's National Provider Identifier (NPI) is 1619931763, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hoa Nguyen's specialty?
- Hoa Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hoa Nguyen located?
- Hoa Nguyen's practice location on file with NPPES is 5835 Westminster Blvd, Westminster, CA 92683-9109.
- What is Hoa Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Hoa Nguyen is (714) 898-9770.
- Does Hoa Nguyen accept Medicare?
- Hoa Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hoa Nguyen's NPI active?
- Yes — Hoa Nguyen's NPI (1619931763) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.