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Dr. Gary R. Briefel, MD
NPI1801853304
- Medicare services, 2019
- 24
- Part D claims, 2021
- 12
- Publications
- 1
- Industry payments
- $605
- State license
- 1
- Practice address
- 451 Clarkson Ave, Brooklyn, NY 11203
- Practice phone
- Call (410) 550-1800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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Dr. Gary R. Briefel is a nephrologist in Brooklyn, New York
Dr. Briefel practices in Brooklyn, New York.
Dr. Briefel's NPI, 1801853304, was assigned on April 27, 2006. Dr. Briefel graduated from Boston University School of Medicine in 1972. Dr. Briefel holds Maryland license D19805.
NPI and contact details
- NPI
- 1801853304NPI Registry (opens in a new tab)
- NPI enumeration date
- April 27, 2006
- NPI status
- Active
- Practice phone
- (410) 550-1800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Gary R. Briefel's practice address is in Brooklyn, New York
Dr. Briefel's practice address in the NPI Registry is 451 Clarkson Ave, Brooklyn, NY 11203, in Kings County. The practice phone is (410) 550-1800.
- NPI Registry address451 Clarkson Ave, Brooklyn, NY 11203 · Kings CountyPhone(410) 550-1800
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Gary R. Briefel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Briefel practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Briefel's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary R. Briefel is one of 914 nephrologists in New York
Nephrology is Dr. Briefel's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Briefel is licensed in Maryland.
Specialties and state licenses
- Nephrology, MarylandPrimary
Nephrologists near Dr. Briefel
Counts of nephrologists 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. Gary R. Briefel billed Medicare for 24 services in 2019
CMS data shows 24 Medicare services from Dr. Briefel across 1 procedure code in 2019. Medicare paid $1,584 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 201924
Paid by Medicare$1,584
Procedure codes1
Dr. Briefel's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Tests and treatments
- 2018: 412019: 2441%
Dr. Briefel compared with the New York median for nephrologists, 2019
- Dr. Briefel
- New York median
- Medicare services
- 24vs 68997% below
- Part D claims
- 12vs 43697% below
Medians across 892 nephrologists in New York with Dmand AI profiles that report each measure.
Dr. Briefel's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Briefel?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Briefel and other nephrologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary R. Briefel's patients have a median age of 33
Across all payers, Dmand AI patient panel data puts Dr. Briefel's median patient age at 33, with 0% women.
Dr. Briefel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 33
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Gary R. Briefel wrote 12 Medicare Part D claims in 2021
In 2021, Dr. Briefel wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $95 in total drug cost. In 2020, CMS named 11 claims across 1 drug.
Part D claims, 202112
Drugs named by CMS1
Total drug cost$95
Dr. Briefel's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 112021: 129%
Drugs named by CMS: 1 in 2021, 1 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gary R. Briefel has 1 publication on record
Dmand AI links 1 paper to Dr. Briefel in 2015. Dr. Briefel's most frequent co-authors are Mary C. Mallappallil, MD, Ravindra L. Mehta, MD and Moro O. Salifu, MD.
Papers1
Dr. Briefel's most frequent co-authors
- Mary C. Mallappallil, MD1 shared paper
- Ravindra L. Mehta, MD1 shared paper
- Moro O. Salifu, MD1 shared paper
Recent publications by Dr. Briefel
See who Dr. Briefel researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Briefel works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gary R. Briefel received $605 in industry payments from 2016 to 2022
CMS Open Payments shows 17 general payments to Dr. Briefel from 10 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. C. R. Bard, Inc. & Subsidiaries paid the most, $202.
General payments to Dr. Briefel by program year, 2016 to 2022
Companies that paid Dr. Briefel the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary R. Briefel graduated from Boston University School of Medicine
Dr. Briefel graduated from Boston University School of Medicine in 1972.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gary R. Briefel'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (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. Gary R. Briefel
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. Gary R. Briefel's NPI number?
Dr. Gary R. Briefel's NPI number is 1801853304. It was assigned on April 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary R. Briefel?
Dr. Gary R. Briefel is a nephrologist in Brooklyn, New York. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Gary R. Briefel practice?
Dr. Briefel practices at 451 Clarkson Ave, Brooklyn, NY 11203.
What is Dr. Gary R. Briefel's office phone number?
The practice phone on file for Dr. Briefel is (410) 550-1800.
What is Dr. Gary R. Briefel's medical license number?
Dr. Briefel holds Maryland license D19805.
Does Dr. Gary R. Briefel accept Medicare?
Yes. CMS data shows Dr. Briefel billed Medicare for 24 services in 2019.
What services does Dr. Gary R. Briefel bill to Medicare?
In 2019, Dr. Briefel's most billed Medicare services were dialysis (90935).
Where did Dr. Gary R. Briefel go to medical school?
Dr. Briefel graduated from Boston University School of Medicine in 1972.
What drugs does Dr. Gary R. Briefel prescribe most?
In 2021 Medicare Part D data, Dr. Briefel's most prescribed drugs by claims were Furosemide.
Has Dr. Gary R. Briefel received payments from drug or device companies?
CMS Open Payments shows $605 in general payments to Dr. Briefel from 10 companies from 2016 to 2022. The largest total came from C. R. Bard, Inc. & Subsidiaries.
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How long has Dr. Gary R. Briefel been practicing?
Dr. Briefel graduated from medical school in 1972, 54 years ago.
Does Dr. Gary R. Briefel do research?
Dmand AI links 1 publication to Dr. Briefel.
Who does Dr. Gary R. Briefel publish with?
Dr. Briefel's most frequent co-authors are Mary C. Mallappallil, MD (1 shared paper), Ravindra L. Mehta, MD (1 shared paper) and Moro O. Salifu, MD (1 shared paper).
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