Bonnie Chen, MD
NPI 1568605947 · Internal Medicine Physician · Oakland, CA
Bonnie Chen, MD is a Internal Medicine Physician provider in Oakland, CA (NPI 1568605947).
Provider details
- NPI number
- 1568605947
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A107226 (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
17 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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Buprenorphine | 48 | 26 |
| Fentanyl | 26 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 24 | 18 |
| Morphine Sulfatebrand: Morphine Sulfate Er | 24 | 15 |
| Oxycodone Hcl | 23 | 18 |
| Hydromorphone Hcl | 15 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$18 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
- 2009-04-14
- Last updated
- 2022-02-11
Frequently asked questions
- What is Bonnie Chen's NPI number?
- Bonnie Chen's National Provider Identifier (NPI) is 1568605947, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bonnie Chen's specialty?
- Bonnie Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Bonnie Chen located?
- Bonnie Chen's practice location on file with NPPES is 275 W Macarthur, Oakland, CA 94611-5641.
- What is Bonnie Chen's phone number?
- The practice phone number listed in the NPPES registry for Bonnie Chen is (510) 752-1000.
- Is Bonnie Chen's NPI active?
- Yes — Bonnie Chen's NPI (1568605947) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.