Allan Chen, MD
NPI 1003829326 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allan Chen, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1003829326).
Provider details
- NPI number
- 1003829326
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A065639 (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 · 119 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 851 | 276 |
| Amlodipine Besylate | 502 | 176 |
| Losartan Potassium | 342 | 116 |
| Rosuvastatin Calcium | 314 | 109 |
| Lisinopril | 271 | 84 |
| Metformin Hclbrand: Metformin Hcl Er | 261 | 94 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-15
- Last updated
- 2021-12-03
Frequently asked questions
- What is Allan Chen's NPI number?
- Allan Chen's National Provider Identifier (NPI) is 1003829326, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allan Chen's specialty?
- Allan Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Allan Chen located?
- Allan Chen's practice location on file with NPPES is 6041 Cadillac Ave, Los Angeles, CA 90034-1702.
- What is Allan Chen's phone number?
- The practice phone number listed in the NPPES registry for Allan Chen is (323) 857-3303.
- Does Allan Chen accept Medicare?
- Allan Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allan Chen's NPI active?
- Yes — Allan Chen's NPI (1003829326) 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.