John W. Chen, M.D.
Neurology Physician · Orange, CA
John W. Chen, M.D. is a neurology physician with a practice address in Orange, California, and NPI 1841210846, issued on Jul 20, 2006. Check the license (California G81195, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John W. Chen
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- G81195 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2617 E Chapman Ave Ste 101, Orange, CA 92869
- Phone
- (714) 202-0218
- Enumerated
- Jul 20, 2006
- Record last updated
- Nov 20, 2025
- Fax
- (714) 832-8233
- Medicaid ID
- 00G811950177 CA
- Medicare enrollment
- Enrolled (PECOS I20120413000198); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1993
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Verify John W. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G81195Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average neurology physician in 2024
2,770 Medicare Part D claims for 352 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 126 claims were for opioids.
Most prescribed
- Gabapentin253 claims
- Donepezil Hcl225 claims
- Memantine Hcl143 claims
- Levetiracetam103 claims
- Gamunex-C98 claims
- Duloxetine Hcl74 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,431.79
167 payments; by number, the most common kind was food and beverage; the largest payer was Ucb, Inc. The 10,858 providers of this specialty with any payment received $8,318.07 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.
John W. Chen among 2,339 neurology physician records in California
John W. Chen, M.D. is one of 2,339 neurology physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1993 · median 2006 among the 1,628 with a school on file
- Record last updated2025 · 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 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Orange → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Huda Alalami, MDOrange, CA 928681760011241
- Aram Asatrian, MD, PHDOrange, CA 928681053989293
- Nicholas Cen, MDOrange, CA 928681770223786
- Nan Cheng, MDOrange, CA 928681235795774
- Anastasia Chumakova, MDOrange, CA 928681881155638
- Rutu Dave, MDOrange, CA 928681235767948
- Philion Hoff, MDOrange, CA 928681902548159
- Tien-Phat Huynh, MD, PHDOrange, CA 928681366070559
Common questions
What is John W. Chen, M.D.'s NPI number?
John W. Chen, M.D.'s National Provider Identifier (NPI) is 1841210846, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John W. Chen, M.D. located?
The NPPES record lists a practice address at 2617 E Chapman Ave Ste 101, Orange, CA, 92869. Phone: (714) 202-0218. Providers update this record themselves, so call before visiting.
How can I verify John W. Chen, M.D.'s license?
NPPES lists California license number G81195, 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 John W. Chen, M.D. prescribe under Medicare Part D?
In 2024, John W. Chen, M.D. had 2,770 Medicare Part D claims for 352 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is John W. Chen, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.