Loi Tran, DO
NPI 1780744979 · Internal Medicine Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Loi Tran, DO is a Internal Medicine Physician provider in Fontana, CA (NPI 1780744979).
Provider details
- NPI number
- 1780744979
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A7326 (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
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 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 58 | 38 |
| Amlodipine Besylate | 35 | 20 |
| Hydralazine Hcl | 35 | 26 |
| Potassium Chloride | 34 | 22 |
| Omeprazole | 33 | 22 |
| Pantoprazole Sodium | 32 | 22 |
| Metoprolol Tartrate | 28 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-11
- Last updated
- 2021-12-03
Frequently asked questions
- What is Loi Tran's NPI number?
- Loi Tran's National Provider Identifier (NPI) is 1780744979, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Loi Tran's specialty?
- Loi Tran is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Loi Tran located?
- Loi Tran's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Loi Tran's phone number?
- The practice phone number listed in the NPPES registry for Loi Tran is (909) 427-3910.
- Does Loi Tran accept Medicare?
- Loi Tran is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Loi Tran's NPI active?
- Yes — Loi Tran's NPI (1780744979) is active in the NPPES registry as of the last update on 2021-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.