Dr. Gregory E. Hallert, MD
- Medicare services, 2024
- 1,452
- Medicare patients, 2024
- 827
- Part D claims, 2024
- 161
- MIPS score, 2024
- 93
- Hospital affiliations
- 1
- Practice address
- 8700 Beverly Blvd, Los Angeles, CA 90048
- Practice phone
- Call (310) 423-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hallert's professional email, personal email and mobile number
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Dr. Gregory E. Hallert is an emergency medicine physician in West Hollywood, California
Dr. Hallert practices at Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System.
Dr. Hallert's NPI, 1801882071, was assigned on September 23, 2005. Dr. Hallert graduated from University of California, Geffen School of Medicine in 1999. Dr. Hallert holds California license A73357.
- NPI
- 1801882071NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921904723
- NPI enumeration date
- September 23, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 423-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory E. Hallert practices at Cedars-Sinai Medical Center in Los Angeles, California
Dr. Hallert's primary practice is Cedars-Sinai Medical Center, at 8700 Beverly Blvd, Los Angeles, CA 90048 in Los Angeles County. The practice phone is (310) 423-5000.
- Cedars-Sinai Medical Center8700 Beverly Blvd, Los Angeles, CA 90048 · Los Angeles CountyPhone(310) 423-5000
Source: Dmand AI Affiliation Data
Dr. Gregory E. Hallert is affiliated with 1 site of care and 1 medical group
Dr. Hallert's primary practice is Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System. The medical group on file is Cedars-Sinai Medical Center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory E. Hallert's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hallert practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cedars-Sinai Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory E. Hallert is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Hallert's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Hallert is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Hallert
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory E. Hallert billed Medicare for 1,452 services in 2024
CMS data shows 1,452 Medicare services from Dr. Hallert across 5 procedure codes in 2024, for 827 Medicare patients. Medicare paid $114,169 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hallert's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7812024: 8256%
- Tests and treatments
- 2023: 5832024: 6278%
Dr. Hallert compared with the California median for emergency medicine physicians, 2024
- Dr. Hallert
- California median
- Medicare services
- 1,452vs 2655.5 times
- Medicare patients
- 827vs 2433.4 times
- Part D claims
- 39vs 6237% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Hallert's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory E. Hallert treated 827 Medicare patients in 2024, average age 76
CMS counts 827 Medicare patients who saw Dr. Hallert in 2024. The largest group is 75 to 84, with 261 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 53% are also on Medicaid. Their average risk score is 2.90, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Hallert's median patient age at 52, with 54% women.
Dr. Hallert's Medicare patients by age, 2024
Dr. Hallert's Medicare patients by sex, 2024
- Women47257%
- Men35543%
Chronic conditions among Dr. Hallert's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis68%
- Ischemic heart disease60%
- Mood disorders49%
- Diabetes48%
- Heart failure48%
- Depression45%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hallert's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory E. Hallert wrote 161 Medicare Part D claims in 2024
In 2024, Dr. Hallert wrote 161 Medicare Part D claims for 106 patients. 91% of them were for generic drugs. CMS names the drug for 39 of them, across 2 drugs with 11 or more claims each, at $170 in total drug cost. In 2023, CMS named 29 claims across 2 drugs.
Dr. Hallert's Part D claims by kind of drug, 2024
- Generic146 claims91%
- Brand-name15 claims9%
Dr. Hallert's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hallert's Part D claims, 2024
- Opioids16%26 of 161 claims
- Antibiotics29%47 of 161 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 292024: 3934%
Drugs named by CMS: 2 in 2024, 2 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gregory E. Hallert scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Hallert for performance year 2024, reported as part of a group. Dr. Hallert accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Hallert's MIPS scores, performance year 2024
- 93of 100Final score
- 77.8of 100Quality
- 98of 100Promoting Interoperability
- 40of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory E. Hallert graduated from University of California, Geffen School of Medicine
Dr. Hallert graduated from University of California, Geffen School of Medicine in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory E. Hallert's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory E. Hallert
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory E. Hallert's NPI number?
Dr. Gregory E. Hallert's NPI number is 1801882071. It was assigned on September 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory E. Hallert?
Dr. Gregory E. Hallert is an emergency medicine physician in West Hollywood, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Gregory E. Hallert practice?
Dr. Hallert practices at 8700 Beverly Blvd, Los Angeles, CA 90048. Dr. Hallert's primary practice is Cedars-Sinai Medical Center in Los Angeles, California, part of Cedars-Sinai Health System.
What is Dr. Gregory E. Hallert's office phone number?
The practice phone on file for Dr. Hallert is (310) 423-5000.
What is Dr. Gregory E. Hallert's medical license number?
Dr. Hallert holds California license A73357.
Which hospitals is Dr. Gregory E. Hallert affiliated with?
Dr. Hallert practices at Cedars-Sinai Medical Center in Los Angeles, California.
What medical group is Dr. Gregory E. Hallert part of?
Dr. Hallert is linked to Cedars-Sinai Medical Center.
Does Dr. Gregory E. Hallert accept Medicare?
Yes. CMS data shows Dr. Hallert billed Medicare for 1,452 services in 2024, and Dr. Hallert accepts Medicare assignment.
What is Dr. Gregory E. Hallert's MIPS score?
Dr. Hallert's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gregory E. Hallert see?
CMS counts 827 Medicare patients who saw Dr. Hallert in 2024, with an average age of 76.
Show 4 more questionsShow fewer questions
What services does Dr. Gregory E. Hallert bill to Medicare?
In 2024, Dr. Hallert's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and emergency department visit (99284).
Where did Dr. Gregory E. Hallert go to medical school?
Dr. Hallert graduated from University of California, Geffen School of Medicine in 1999.
What drugs does Dr. Gregory E. Hallert prescribe most?
In 2024 Medicare Part D data, Dr. Hallert's most prescribed drugs by claims were Hydrocodone-Acetaminophen and Cephalexin.
How long has Dr. Gregory E. Hallert been practicing?
Dr. Hallert graduated from medical school in 1999, 27 years ago.
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