Andrew Chen
NPI 1053873646 · Internal Medicine Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Chen is a Internal Medicine Physician provider in Fontana, CA (NPI 1053873646).
Provider details
- NPI number
- 1053873646
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A182957 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 49 | 21 |
| Diclofenac Sodium | 29 | 19 |
| Metformin Hcl | 22 | — |
| Cyclobenzaprine Hcl | 22 | 12 |
| Amlodipine Besylate | 18 | — |
| Losartan Potassium | 17 | — |
| Tamsulosin Hcl | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$99 across 4 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
- 2019-04-02
- Last updated
- 2023-03-15
- Certified
- 2023-03-15
Frequently asked questions
- What is Andrew Chen's NPI number?
- Andrew Chen's National Provider Identifier (NPI) is 1053873646, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Chen's specialty?
- Andrew Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Chen located?
- Andrew Chen's practice location on file with NPPES is 14050 Cherry Ave Ste C, Fontana, CA 92337-8312.
- What is Andrew Chen's phone number?
- The practice phone number listed in the NPPES registry for Andrew Chen is (909) 823-5220.
- Does Andrew Chen accept Medicare?
- Andrew Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Chen's NPI active?
- Yes — Andrew Chen's NPI (1053873646) is active in the NPPES registry as of the last update on 2023-03-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.