Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Jeremy Demetri Williams, MD

Individual provider Emergency Medicine Physician · NPI 1023052230

Dr. Jeremy Demetri Williams, MD practises Emergency Medicine in Monterey Park, California. Graduated from Wake Forest University School of Medicine in 1998, 28 years ago. Practices with Gem Medical Group Corporation, a 56-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
28
Trained at
Wake Forest University School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

525 N Garfield Ave
Monterey Park, CA 91754-1202 Not confirmed with CMS for 18 years — call before visiting
Phone: (626) 307-2129
Fax: (626) 307-2056
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A76509 (CA)

Record details

NPI number1023052230
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 16, 2006
Last updated in NPPESJune 11, 2008

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolWAKE FOREST UNIVERSITY SCHOOL OF MEDICINE
Graduated 1998 (28 years in practice)
Group practice Gem Medical Group Corporation — 56 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients321
Services billed 577 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Gem Medical Group Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 56 clinicians in the practice; 12 are shown here.

Other providers in Monterey Park