Gregory Hallert, MD
Emergency Medicine Physician · Los Angeles, CA
Gregory Hallert, MD is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1801882071, issued on Sep 23, 2005. Check the license (California A73357, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Hallert
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A73357 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8700 Beverly Blvd, Los Angeles, CA 90048
- Phone
- (310) 423-8600
- Enumerated
- Sep 23, 2005
- Record last updated
- Aug 14, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (310) 967-1800
- Medicare enrollment
- Enrolled (PECOS I20031211000602); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 8700 Beverly Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory Hallert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A73357Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average emergency medicine physician in 2024
161 Medicare Part D claims for 106 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 26 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen21 claims
- Cephalexin18 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): 87.7 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).
One hospital affiliation
- Cedars-Sinai Medical CenterWest Hollywood, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gregory Hallert among 7,751 emergency medicine physician records in California
Gregory Hallert, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1999 · median 2011 among the 4,560 with a school on file
- Record last updated2014 · 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 Los Angeles → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- David Barcay, M.D.Los Angeles, CA 900481891789764
- Scott Braunstein, M.D.West Hollywood, CA 900481427042050
- Kenneth Corre, M.D.West Hollywood, CA 900481487648358
- David Frankle, M.D.Los Angeles, CA 900481013901644
- Laurance Friedman, M.D.Los Angeles, CA 900481225022098
- Susan Gardner, M.D.Los Angeles, CA 900481922092550
- Dan Katz, M.D.Los Angeles, CA 900481922094101
- Wendy Lin, M.D.Los Angeles, CA 900481558357723
Common questions
What is Gregory Hallert, MD's NPI number?
Gregory Hallert, MD's National Provider Identifier (NPI) is 1801882071, issued on Sep 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Hallert, MD located?
The NPPES record lists a practice address at 8700 Beverly Blvd, Los Angeles, CA, 90048. Phone: (310) 423-8600. Providers update this record themselves, so call before visiting.
How can I verify Gregory Hallert, MD's license?
NPPES lists California license number A73357, 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 Gregory Hallert, MD prescribe under Medicare Part D?
In 2024, Gregory Hallert, MD had 161 Medicare Part D claims for 106 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Gregory Hallert, MD's MIPS final score?
The 2023 MIPS final score is 87.7 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.