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

Dr. Gregory Hallert, MD

Individual provider Emergency Medicine Physician · NPI 1801882071

Dr. Gregory Hallert, MD practises Emergency Medicine in Los Angeles, California. Graduated from University of California, Geffen School of Medicine in 1999, 27 years ago. Practices with Cedars-Sinai Medical Center, a 795-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
27
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
In the registry since
2005
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

8700 Beverly Blvd
Los Angeles, CA 90048-1865 Not confirmed with CMS for 12 years — call before visiting
Phone: (310) 423-8600
Fax: (310) 967-1800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A73357 (CA)
Family Medicine Physician Taxonomy 207Q00000X · Licence A73357 (CA)
Emergency Medical Services (Emergency Medicine) Physician Taxonomy 207PE0004X · Licence A73357 (CA)

Record details

NPI number1801882071
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 23, 2005
Last updated in NPPESAugust 14, 2014

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Cedars-Sinai Medical Center — 795 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 patients827
Services billed 1,510 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 Cedars-Sinai Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 795 clinicians in the practice; 12 are shown here.

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