Joanne Nguyen, D.O.
NPI 1245289503 · Emergency Medical Services (Emergency Medicine) Physician · Union City, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanne Nguyen, D.O. is a Emergency Medical Services (Emergency Medicine) Physician provider in Union City, CA (NPI 1245289503).
Provider details
- NPI number
- 1245289503
- Entity type
- Individual
- Primary specialty
- Emergency Medical Services (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 20A8713 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 300 | 100 |
| Losartan Potassium | 183 | 59 |
| Amlodipine Besylate | 167 | 56 |
| Lisinopril | 149 | 45 |
| Levothyroxine Sodium | 138 | 41 |
| Hydrochlorothiazide | 137 | 43 |
| Lisinopril/Hydrochlorothiazidebrand: Lisinopril-Hydrochlorothiazide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-06
- Last updated
- 2022-01-04
Frequently asked questions
- What is Joanne Nguyen's NPI number?
- Joanne Nguyen's National Provider Identifier (NPI) is 1245289503, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanne Nguyen's specialty?
- Joanne Nguyen is listed in the NPPES registry with a primary specialty of Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Joanne Nguyen located?
- Joanne Nguyen's practice location on file with NPPES is 3553 Whipple Rd, Union City, CA 94587-1507.
- What is Joanne Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Joanne Nguyen is (510) 454-1000.
- Does Joanne Nguyen accept Medicare?
- Joanne Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanne Nguyen's NPI active?
- Yes — Joanne Nguyen's NPI (1245289503) is active in the NPPES registry as of the last update on 2022-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.