Jefferson William Chen, MD PHD
Neurological Surgery Physician · Orange, CA
Jefferson William Chen, MD PHD is a neurological surgery physician with a practice address in Orange, California, and NPI 1992789747, issued on Dec 5, 2005. Check the license (California A45489, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jefferson William Chen
- Credential
- MD PHD
- Primary taxonomy
- Neurological Surgery Physician 207T00000X
- License numbers
- A45489 CA
21671 AZ
MD21924 OR
J6902 TX
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 880-7812
- Enumerated
- Dec 5, 2005
- Record last updated
- Nov 3, 2022
- Medicare enrollment
- Enrolled (PECOS I20140709000281); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 1987
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurological surgery physician records → All 929 in California → Look up another NPI →
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Jefferson William Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A45489Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average neurological surgery physician in 2024
16 Medicare Part D claims, against an average of 172 among the 4,378 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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
- Regents OF The University OF CaliforniaOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jefferson William Chen among 929 neurological surgery physician records in California
Jefferson William Chen, MD PHD is one of 929 neurological surgery physician records with a practice address in California. 77% 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, 95% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1987 · median 2005 among the 612 with a school on file
- Record last updated2022 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207T00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurological Surgery Physician providers in California
There are 929 neurological surgery physician records in California.
All 929 in California → Every provider in Orange → Neurological Surgery Physician nationwide →
The 8 neurological surgery physician records with the nearest ZIP codes
- Lars Anker, MDOrange, CA 928681962548537
- Gilbert Cadena, MDOrange, CA 928681760649255
- Kiarash Golshani, M.D.Orange, CA 928681992913214
- Frank Hsu, M.D.Orange, CA 928681548298417
- John A Kusske, MDOrange, CA 928681275601593
- Mark Linskey, MDOrange, CA 928681316041908
- Michael Muhonen, MDOrange, CA 928681801804810
- Bradley Noblett, MDOrange, CA 928681689788507
Common questions
What is Jefferson William Chen, MD PHD's NPI number?
Jefferson William Chen, MD PHD's National Provider Identifier (NPI) is 1992789747, issued on Dec 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jefferson William Chen, MD PHD located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 880-7812. Providers update this record themselves, so call before visiting.
How can I verify Jefferson William Chen, MD PHD's license?
NPPES lists California license number A45489, 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 Jefferson William Chen, MD PHD prescribe under Medicare Part D?
In 2024, Jefferson William Chen, MD PHD had 16 Medicare Part D claims; the average among neurological surgery physician prescribers was 172. 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.