Maxwell Jen, MD
Emergency Medicine Physician · Tustin, CA
Maxwell Jen, MD is an emergency medicine physician with a practice address in Tustin, California, and NPI 1154688810, issued on Apr 19, 2012. Check the license (California A130209, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Maxwell Jen
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A130209 CA
Self-reported in NPPES; status is on the state search - Practice location
- 17400 Irvine Blvd Ste N, Tustin, CA 92780
- Phone
- (111) 111-1111
- Enumerated
- Apr 19, 2012
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150702000667); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Verify Maxwell Jen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A130209Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average emergency medicine physician in 2024
105 Medicare Part D claims for 36 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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: $18.71
1 payment: food and beverage; the largest payer was Galderma Laboratories, L.P. 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 3 group practices
- Regents OF The University OFOrange, CA
- Remedial Patients Care IncCorona, CA
- Vital Medical Group IncGlendale, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maxwell Jen among 7,751 emergency medicine physician records in California
Maxwell Jen, 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 2012, is newer than 63% of them.
- NPI issued2012 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2012 · median 2011 among the 4,560 with a school on file
- Record last updated2021 · 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).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Tustin → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Philip Fagan, M.D.Tustin, CA 927801255335154
- Martha Herrero, MDTustin, CA 927801932269156
- Fergus Ng, MDTustin, CA 927801700806981
- Andrew Tran, MDTustin, CA 927801669408621
- Yusaku Uchimura, MDTustin, CA 927801487670873
- Jai Ho, MDAnaheim, CA 928011396788345
- Christopher Lai, M.DAnaheim, CA 928011487670907
- Richard Oxman, M.D.Anaheim, CA 928011487704789
Common questions
What is Maxwell Jen, MD's NPI number?
Maxwell Jen, MD's National Provider Identifier (NPI) is 1154688810, issued on Apr 19, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Maxwell Jen, MD located?
The NPPES record lists a practice address at 17400 Irvine Blvd Ste N, Tustin, CA, 92780. Phone: (111) 111-1111. Providers update this record themselves, so call before visiting.
How can I verify Maxwell Jen, MD's license?
NPPES lists California license number A130209, 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 Maxwell Jen, MD prescribe under Medicare Part D?
In 2024, Maxwell Jen, MD had 105 Medicare Part D claims for 36 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.