Dr. Justin David Mazur, MD
- Medicare services, 2024
- 49
- Medicare patients, 2024
- 50
- Part D claims, 2024
- 25
- MIPS score, 2024
- 93
- Hospital affiliations
- 1
- Practice address
- 100 E 77th St, New York, NY 10075
- Practice phone
- Call (212) 434-2842
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lenox Hill Hospital
New York, New York
Find Dr. Mazur's professional email, personal email and mobile number
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Dr. Justin David Mazur is an emergency medicine physician in New York, New York
Dr. Mazur practices at Lenox Hill Hospital in New York, New York.
Dr. Mazur's NPI, 1962603068, was assigned on May 29, 2007. Dr. Mazur graduated from Lewis Katz School of Medicine at Temple University in 2004. Dr. Mazur holds New York license 244263.
- NPI
- 1962603068NPI Registry (opens in a new tab)
- NPI enumeration date
- May 29, 2007
- NPI status
- Active
- Practice phone
- (212) 434-2842
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Justin David Mazur practices at Lenox Hill Hospital in New York, New York
Dr. Mazur's primary practice is Lenox Hill Hospital, at 100 E 77th St, New York, NY 10075 in New York County. The practice phone is (212) 434-2842.
- Lenox Hill Hospital100 E 77th St, New York, NY 10075 · New York CountyPhone(212) 434-2842
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Justin David Mazur is affiliated with 2 sites of care and 2 medical groups
Dr. Mazur's primary practice is Lenox Hill Hospital in New York, New York. Dr. Mazur is also affiliated with Maimonides Medical Center. The medical group on file is Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI also links Dr. Mazur to 1 more medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Justin David Mazur's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mazur practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lenox Hill Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Justin David Mazur is one of 3,709 emergency medicine physicians in New York
Emergency medicine is Dr. Mazur's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Mazur is licensed in New York.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
Emergency medicine physicians near Dr. Mazur
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. Justin David Mazur billed Medicare for 49 services in 2024
CMS data shows 49 Medicare services from Dr. Mazur across 2 procedure codes in 2024, for 50 Medicare patients. Medicare paid $6,061 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mazur's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2712024: 4982%
Dr. Mazur compared with the New York median for emergency medicine physicians, 2024
- Dr. Mazur
- New York median
- Medicare services
- 49vs 21978% below
- Medicare patients
- 50vs 21677% below
- Part D claims
- 13vs 2955% below
Medians across 3,510 emergency medicine physicians in New York with Dmand AI profiles that report each measure.
Dr. Mazur'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mazur and other emergency medicine physicians in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Justin David Mazur treated 50 Medicare patients in 2024, average age 77
CMS counts 50 Medicare patients who saw Dr. Mazur in 2024. The largest group is 65 to 74, with 18 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 30% are also on Medicaid. Their average risk score is 2.28, 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. Mazur's median patient age at 36, with 74% women.
Dr. Mazur's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mazur's Medicare patients by sex, 2024
- Women2754%
- Men2346%
Chronic conditions among Dr. Mazur's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis60%
- Anxiety42%
- Ischemic heart disease42%
- Heart failure40%
- Diabetes36%
- Mood disorders36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mazur's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 36
Patient panel by sex, all payers
- Women74%
- Men26%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Justin David Mazur wrote 25 Medicare Part D claims in 2024
In 2024, Dr. Mazur wrote 25 Medicare Part D claims for 23 patients. 88% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $1,130 in total drug cost. In 2022, CMS named 29 claims across 2 drugs.
Dr. Mazur's Part D claims by kind of drug, 2024
- Generic22 claims88%
- Brand-name and other3 claims12%
Dr. Mazur's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 292023: 1355%
Drugs named by CMS: 1 in 2023, 2 in 2022.
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. Justin David Mazur 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. Mazur for performance year 2024, reported through an alternative payment model (APM).
Dr. Mazur's MIPS scores, performance year 2024
- 93of 100Final score
- 79.8of 100Quality
- 89of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Justin David Mazur received $79 in industry payments from 2024 to 2025
CMS Open Payments shows 2 general payments to Dr. Mazur from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $58.
General payments to Dr. Mazur by program year, 2024 to 2025
Companies that paid Dr. Mazur the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Justin David Mazur graduated from Lewis Katz School of Medicine at Temple University
Dr. Mazur graduated from Lewis Katz School of Medicine at Temple University in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Justin David Mazur'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| 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. Justin David Mazur
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. Justin David Mazur's NPI number?
Dr. Justin David Mazur's NPI number is 1962603068. It was assigned on May 29, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Justin David Mazur?
Dr. Justin David Mazur is an emergency medicine physician in New York, New York. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Justin David Mazur practice?
Dr. Mazur practices at 100 E 77th St, New York, NY 10075. Dr. Mazur's primary practice is Lenox Hill Hospital in New York, New York. Dmand AI also links Dr. Mazur to 1 medical group.
What is Dr. Justin David Mazur's office phone number?
The practice phone on file for Dr. Mazur is (212) 434-2842.
What is Dr. Justin David Mazur's medical license number?
Dr. Mazur holds New York license 244263.
Which hospitals is Dr. Justin David Mazur affiliated with?
Dr. Mazur is affiliated with Maimonides Medical Center.
What medical group is Dr. Justin David Mazur part of?
Dr. Mazur is linked to Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI links Dr. Mazur to 1 more medical group.
Does Dr. Justin David Mazur accept Medicare?
Yes. CMS data shows Dr. Mazur billed Medicare for 49 services in 2024.
What is Dr. Justin David Mazur's MIPS score?
Dr. Mazur's MIPS final score for performance year 2024 is 93 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Justin David Mazur see?
CMS counts 50 Medicare patients who saw Dr. Mazur in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. Justin David Mazur bill to Medicare?
In 2024, Dr. Mazur's most billed Medicare services were emergency department visit (99285) and emergency department visit (99284).
Where did Dr. Justin David Mazur go to medical school?
Dr. Mazur graduated from Lewis Katz School of Medicine at Temple University in 2004.
What drugs does Dr. Justin David Mazur prescribe most?
In 2023 Medicare Part D data, Dr. Mazur's most prescribed drugs by claims were Cefpodoxime Proxetil.
Has Dr. Justin David Mazur received payments from drug or device companies?
CMS Open Payments shows $79 in general payments to Dr. Mazur from 2 companies from 2024 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Justin David Mazur been practicing?
Dr. Mazur graduated from medical school in 2004, 22 years ago.
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