Joanna Chen, MD
NPI 1851463335 · Internal Medicine Physician · Baldwin Park, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanna Chen, MD is a Internal Medicine Physician provider in Baldwin Park, CA (NPI 1851463335).
Provider details
- NPI number
- 1851463335
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A67859 (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
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 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 379 | 155 |
| Amlodipine Besylate | 317 | 125 |
| Losartan Potassium | 300 | 114 |
| Levothyroxine Sodium | 194 | 66 |
| Simvastatin | 187 | 66 |
| Lisinopril | 178 | 62 |
| Atenolol | 171 | 56 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (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
- 2006-11-14
- Last updated
- 2021-11-22
Frequently asked questions
- What is Joanna Chen's NPI number?
- Joanna Chen's National Provider Identifier (NPI) is 1851463335, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Chen's specialty?
- Joanna Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joanna Chen located?
- Joanna Chen's practice location on file with NPPES is 1011 Baldwin Park Blvd, Baldwin Park, CA 91706-5806.
- What is Joanna Chen's phone number?
- The practice phone number listed in the NPPES registry for Joanna Chen is (626) 851-1011.
- Does Joanna Chen accept Medicare?
- Joanna Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanna Chen's NPI active?
- Yes — Joanna Chen's NPI (1851463335) is active in the NPPES registry as of the last update on 2021-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.