Diana Chen, MD, MBA
Addiction Medicine (Family Medicine) Physician · Oakland, CA
Diana Chen, MD, MBA is an addiction medicine (family medicine) physician with a practice address in Oakland, California, and NPI 1073136057, issued on May 25, 2020. Check the license (California A188341, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diana Chen
- Credential
- MD, MBA
- Primary taxonomy
- Addiction Medicine (Family Medicine) Physician 207QA0401X
- License number
- A188341 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2950 International Blvd, Oakland, CA 94601
- Phone
- (510) 535-4400
- Enumerated
- May 25, 2020
- Record last updated
- Jul 30, 2026
- Entity
- Type 1 · individual
8 nearest addiction medicine (family medicine) physician records → All 124 in California → Look up another NPI →
Also registered at 2950 International Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Acosta, RDADental Assistant1932529658
- Karina Alcala BarbosaDentist1831608876
- Sandy AlegriaCase Manager/Care Coordinator1285220228
- Christopher Balkissoon, DNP, MSN, FNP-CFamily Nurse Practitioner1598159410
- Dipti Barot, M.D.General Practice Physician1689972184
- Jennifer BarreraFamily Nurse Practitioner1730876822
Verify Diana Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A188341Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average addiction medicine (family medicine) physician in 2024
225 Medicare Part D claims for 47 beneficiaries, against an average of 664 among the 581 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Buprenorphine-Naloxone17 claims
- Atorvastatin Calcium15 claims
- Duloxetine Hcl15 claims
- Pregabalin14 claims
- Mirtazapine12 claims
- Gabapentin11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Diana Chen among 124 addiction medicine (family medicine) physician records in California
Diana Chen, MD, MBA is one of 124 addiction medicine (family medicine) physician records with a practice address in California. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 84% of them.
- NPI issued2020 · 84% of these records are older, 10% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 52% of these records are
- Record last updated2026 · 33% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0401X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Addiction Medicine (Family Medicine) Physician providers in California
There are 124 addiction medicine (family medicine) physician records in California.
All 124 in California → Every provider in Oakland → Addiction Medicine (Family Medicine) Physician nationwide →
The 8 addiction medicine (family medicine) physician records with the nearest ZIP codes
- Matilde Fredrickson, DOOakland, CA 946021770011348
- Belis Aladag, MD, MPH, FASAMWalnut Creek, CA 945971295994275
- Katrina Groves-Rehwaldt, MDWalnut Creek, CA 945971487748943
- Alexandra Arenson, DOWalnut Creek, CA 945961689170573
- Judith Martin, MDOakland, CA 946061073703682
- Simon Ma, MD, MPHSan Leandro, CA 945771811578461
- Diane Hambrick, M.D.Saint Helena, CA 945741205859683
- Myriam Aisha KaneMartinez, CA 945531881210011
Common questions
What is Diana Chen, MD, MBA's NPI number?
Diana Chen, MD, MBA's National Provider Identifier (NPI) is 1073136057, issued on May 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Diana Chen, MD, MBA located?
The NPPES record lists a practice address at 2950 International Blvd, Oakland, CA, 94601. Phone: (510) 535-4400. Providers update this record themselves, so call before visiting.
How can I verify Diana Chen, MD, MBA's license?
NPPES lists California license number A188341, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diana Chen, MD, MBA prescribe under Medicare Part D?
In 2024, Diana Chen, MD, MBA had 225 Medicare Part D claims for 47 beneficiaries; the average among addiction medicine (family medicine) physician prescribers was 664. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.