Chuan-Jay J. Chen, MD
Emergency Medicine Physician · Saint Helena, CA
Chuan-Jay J. Chen, MD is an emergency medicine physician with a practice address in Saint Helena, California, and NPI 1205366457, issued on Jun 19, 2017. Check the license (California 171993, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chuan-Jay J. Chen
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 171993 CA
272210 MA
Self-reported in NPPES; status is on the state search - Practice location
- 10 Woodland RD, Saint Helena, CA 94574
- Phone
- (707) 963-6425
- Enumerated
- Jun 19, 2017
- Record last updated
- Oct 4, 2022
- Medicare enrollment
- Enrolled (PECOS I20210518002205); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 10 Woodland RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nora Allen, RN, CNSAcute Care Clinical Nurse Specialist1710481932
- Stephen Banks, MDRadiation Oncology Physician1770680852
- Wendy Battistini, PTPhysical Therapist1215888276
- Julie Butulia, RDRegistered Dietitian1679376891
- Danny Cao, PHARMACISTPharmacist1447069570
- David Carelock, CRNACertified Registered Nurse Anesthetist1790773596
Verify Chuan-Jay J. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 171993Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average emergency medicine physician in 2024
490 Medicare Part D claims for 278 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Cefdinir41 claims
- Ondansetron Odt30 claims
- Cefadroxil24 claims
- Prednisone23 claims
- Oxycodone Hcl22 claims
- Amoxicillin-Clavulanate Potass18 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 practice group's MIPS final score for 2023 (Medicare payment program): 86.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,116.00
1 payment: consulting fee; the largest payer was Exo Imaging, Inc. The 12,335 providers of this specialty with any payment received $953.79 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
- Mills-Peninsula Emergency Medical Associates, IncBurlingame, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chuan-Jay J. Chen among 7,751 emergency medicine physician records in California
Chuan-Jay J. Chen, MD is one of 7,751 emergency medicine 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 2017, is newer than 78% of them.
- NPI issued2017 · 78% of these records are older, 19% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2017 · median 2011 among the 4,560 with a school on file
- Record last updated2022 · 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 emergency medicine physician records list a practice address in Saint Helena
They are 5 of the 232 NPPES records with a practice address in Saint Helena, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Saint Helena → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Edwin Carlson, M.D.Saint Helena, CA 945741174507552
- Dan Clay, M.D.Saint Helena, CA 945741033192547
- Jose Miranda, M.D.Saint Helena, CA 945741508840513
- Edward Stump, M.D.Saint Helena, CA 945741619950193
- Rabiatu Abdullah, M.D.San Leandro, CA 945771497833248
- George Brown, M.D.San Leandro, CA 945771174601660
- Calder Conner, MDSan Leandro, CA 945771770537433
- Robert Fan, M.D.San Leandro, CA 945771316987977
Common questions
What is Chuan-Jay J. Chen, MD's NPI number?
Chuan-Jay J. Chen, MD's National Provider Identifier (NPI) is 1205366457, issued on Jun 19, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Chuan-Jay J. Chen, MD located?
The NPPES record lists a practice address at 10 Woodland RD, Saint Helena, CA, 94574. Phone: (707) 963-6425. Providers update this record themselves, so call before visiting.
How can I verify Chuan-Jay J. Chen, MD's license?
NPPES lists California license number 171993, 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 Chuan-Jay J. Chen, MD prescribe under Medicare Part D?
In 2024, Chuan-Jay J. Chen, MD had 490 Medicare Part D claims for 278 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Chuan-Jay J. Chen, MD's MIPS final score?
The 2023 MIPS final score is 86.3 of 100, reported for the practice group. 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.