Tom Nguyen, DO
NPI 1598729980 · Family Medicine Physician · Rosemead, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tom Nguyen, DO is a Family Medicine Physician provider in Rosemead, CA (NPI 1598729980).
Provider details
- NPI number
- 1598729980
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A9384 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
110 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 43 | $187 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 38 | $9 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 17 | $129 |
| Critical Care, First 30-74 Minutes99291 | 12 | $231 |
Typical Medicare-allowed amounts for these services range $9–$231 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 57 | 13 |
| Alendronate Sodium | 42 | — |
| Atorvastatin Calcium | 32 | 12 |
| Simvastatin | 22 | — |
| Celecoxib | 21 | — |
| Amoxicillin | 19 | — |
| Azithromycin | 19 | 11 |
| Azelastine Hcl | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-13
- Last updated
- 2009-09-01
Frequently asked questions
- What is Tom Nguyen's NPI number?
- Tom Nguyen's National Provider Identifier (NPI) is 1598729980, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tom Nguyen's specialty?
- Tom Nguyen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tom Nguyen located?
- Tom Nguyen's practice location on file with NPPES is 9146 E. Valley Blvd Suite a, Rosemead, CA 91770-1920.
- What is Tom Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Tom Nguyen is (626) 571-6908.
- Does Tom Nguyen accept Medicare?
- Tom Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tom Nguyen's NPI active?
- Yes — Tom Nguyen's NPI (1598729980) is active in the NPPES registry as of the last update on 2009-09-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.