Joseph Chun, D.O.
Physical Medicine & Rehabilitation Physician · Oakland, CA
Joseph Chun, D.O. is a physical medicine & rehabilitation physician with a practice address in Oakland, California, and NPI 1780678789, issued on Sep 6, 2005. Check the license (California 20A20260, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Chun
- Credential
- D.O.
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- 20A20260 CA
Self-reported in NPPES; status is on the state search - Practice location
- 275 W Macarthur Blvd, Oakland, CA 94611
- Phone
- (510) 752-1000
- Enumerated
- Sep 6, 2005
- Record last updated
- Mar 22, 2024
- Medicaid ID
- 101120884-0001 PA
- Medicare enrollment
- Enrolled (PECOS I20230309001565); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 1,549 in California → Look up another NPI →
Also registered at 275 W Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Aaronson, MDUrology Physician1215053129
- Paul-Andre Abboud, M.D.Emergency Medicine Physician1710065503
- Brittany Abeldt, MDPsychiatry Physician1982353884
- Bilal Abu-Alrub, DOStudent in an Organized Health Care Education/Training Program1609760768
- Walter Acuna, MDInternal Medicine Physician1972655108
- Brett Adams, MDStudent in an Organized Health Care Education/Training Program1841731098
Verify Joseph Chun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A20260Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average physical medicine & rehabilitation physician in 2024
255 Medicare Part D claims for 142 beneficiaries, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 14 claims were for opioids.
Most prescribed
- Gabapentin58 claims
- Baclofen40 claims
- Methylprednisolone39 claims
- Lorazepam22 claims
- Nabumetone13 claims
- Pregabalin12 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.
Bills Medicare through one group practice
- Permanente Medical Group IncMartinez, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Chun among 1,549 physical medicine & rehabilitation physician records in California
Joseph Chun, D.O. is one of 1,549 physical medicine & rehabilitation physician records with a practice address in California. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 97% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated1999 · median 2008 among the 786 with a school on file
- Record last updated2024 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in California
There are 1,549 physical medicine & rehabilitation physician records in California.
All 1,549 in California → Every provider in Oakland → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Richard Aptaker, DOOakland, CA 946111962580761
- Rhonda Caldwell-Williams, MDOakland, CA 946111629163340
- Laura CannonOakland, CA 946111619471554
- Margaret Cosgrove, DPTOakland, CA 946111043723695
- Suparna Dutta, MDOakland, CA 946111275611048
- Chiachen Hsu, MDOakland, CA 946111215015003
- Xiaohua Jiang, MDOakland, CA 946111861544660
- Stacy Lam, MDOakland, CA 946111497214720
Common questions
What is Joseph Chun, D.O.'s NPI number?
Joseph Chun, D.O.'s National Provider Identifier (NPI) is 1780678789, issued on Sep 6, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Chun, D.O. located?
The NPPES record lists a practice address at 275 W Macarthur Blvd, Oakland, CA, 94611. Phone: (510) 752-1000. Providers update this record themselves, so call before visiting.
How can I verify Joseph Chun, D.O.'s license?
NPPES lists California license number 20A20260, 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 Joseph Chun, D.O. prescribe under Medicare Part D?
In 2024, Joseph Chun, D.O. had 255 Medicare Part D claims for 142 beneficiaries; the average among physical medicine & rehabilitation physician prescribers was 727. 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.