Thomas Chen, M.D.
NPI 1053329227 · Internal Medicine Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Chen, M.D. is a Internal Medicine Physician provider in Riverside, CA (NPI 1053329227).
Provider details
- NPI number
- 1053329227
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A85898 (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 tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 138 | 51 |
| Losartan Potassium | 97 | 35 |
| Amlodipine Besylate | 86 | 26 |
| Rosuvastatin Calcium | 54 | 21 |
| Lisinopril | 53 | 22 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 49 | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$148 across 2 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
- 2006-08-04
- Last updated
- 2021-11-29
- Certified
- 2020-02-13
Frequently asked questions
- What is Thomas Chen's NPI number?
- Thomas Chen's National Provider Identifier (NPI) is 1053329227, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Chen's specialty?
- Thomas Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Chen located?
- Thomas Chen's practice location on file with NPPES is 7117 Brockton Ave, Riverside, CA 92506-2658.
- What is Thomas Chen's phone number?
- The practice phone number listed in the NPPES registry for Thomas Chen is (951) 782-3849.
- Does Thomas Chen accept Medicare?
- Thomas Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Chen's NPI active?
- Yes — Thomas Chen's NPI (1053329227) 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.