Thomas C. Chen, M.D., PHD
Neurological Surgery Physician · Los Angeles, CA
Thomas C. Chen, M.D., PHD is a neurological surgery physician with a practice address in Los Angeles, California, and NPI 1225071509, issued on Jun 14, 2006. Check the license (California G66798, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas C. Chen
- Credential
- M.D., PHD
- Primary taxonomy
- Neurological Surgery Physician 207T00000X
- License number
- G66798 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1520 San Pablo St, Los Angeles, CA 90033
- Phone
- (323) 442-5720
- Enumerated
- Jun 14, 2006
- Record last updated
- Nov 27, 2023
- Fax
- (323) 442-7543
- Medicare enrollment
- Enrolled (PECOS I20090615000595); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1988
- 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 1520 San Pablo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas C. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G66798Check 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 for 13 beneficiaries, 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.
Industry payments in 2024: $177.30
2 payments; by number, the most common kind was food and beverage; the largest payer was Cerapedics Inc. The 5,377 providers of this specialty with any payment received $14,925.58 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Usc Care Medical Group IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas C. Chen among 929 neurological surgery physician records in California
Thomas C. Chen, M.D., 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 62% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1988 · median 2005 among the 612 with a school on file
- Record last updated2023 · 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 Los Angeles → Neurological Surgery Physician nationwide →
The 8 neurological surgery physician records with the nearest ZIP codes
- Arun Amar, MDLos Angeles, CA 900331447348032
- Michael Apuzzo, M.D.Los Angeles, CA 900331720027501
- Frank Attenello, M.D., M.S.Los Angeles, CA 900331386818227
- Steven Giannotta, M.D.Los Angeles, CA 900331114978871
- John Gruen, M.D.Los Angeles, CA 900331194769570
- Patrick Hsieh, MDLos Angeles, CA 900331942405956
- Charles Liu, M.D., PHDLos Angeles, CA 900331568406080
- John Liu, MDLos Angeles, CA 900331235161449
Common questions
What is Thomas C. Chen, M.D., PHD's NPI number?
Thomas C. Chen, M.D., PHD's National Provider Identifier (NPI) is 1225071509, issued on Jun 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas C. Chen, M.D., PHD located?
The NPPES record lists a practice address at 1520 San Pablo St, Los Angeles, CA, 90033. Phone: (323) 442-5720. Providers update this record themselves, so call before visiting.
How can I verify Thomas C. Chen, M.D., PHD's license?
NPPES lists California license number G66798, 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 Thomas C. Chen, M.D., PHD prescribe under Medicare Part D?
In 2024, Thomas C. Chen, M.D., PHD had 16 Medicare Part D claims for 13 beneficiaries; 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.