Tranhoai Nguyen, M.D.
NPI 1558411439 · Internal Medicine Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tranhoai Nguyen, M.D. is a Internal Medicine Physician provider in Riverside, CA (NPI 1558411439).
Provider details
- NPI number
- 1558411439
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 6093 (NE)
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 tenure38% of score
19 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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ipratropium Bromide | 162 | 65 |
| Budesonide/Formoterol Fumaratebrand: Breyna | 80 | 29 |
| Montelukast Sodium | 63 | 19 |
| Dupilumabbrand: Dupixent Syringe | 60 | — |
| Epinephrine | 47 | 25 |
| Azelastine Hcl | 42 | 24 |
| Tiotropium Bromidebrand: Spiriva Respimat | 42 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-11
- Last updated
- 2021-11-29
Frequently asked questions
- What is Tranhoai Nguyen's NPI number?
- Tranhoai Nguyen's National Provider Identifier (NPI) is 1558411439, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tranhoai Nguyen's specialty?
- Tranhoai Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tranhoai Nguyen located?
- Tranhoai Nguyen's practice location on file with NPPES is 10800 Magnolia Ave, Riverside, CA 92505-3043.
- What is Tranhoai Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Tranhoai Nguyen is (951) 353-2000.
- Does Tranhoai Nguyen accept Medicare?
- Tranhoai Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tranhoai Nguyen's NPI active?
- Yes — Tranhoai Nguyen's NPI (1558411439) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.