Emergency Service, HospitalHypoxiaIntubation, Intratracheal
Dr. Mark Fenig, MD, MPH
NPI1114101169PAC ID4486779931
- Medicare services, 2024
- 369
- Medicare patients, 2024
- 331
- Part D claims, 2024
- 82
- Publications
- 3
- Hospital affiliations
- 2
- Practice address
- 201 Manor Pl, Greenport, NY 11944
- Practice phone
- Call (631) 477-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Eastern Long Island Hospital
Greenport, New York
Find Dr. Fenig's professional email, personal email and mobile number
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Dr. Mark Fenig is an emergency medicine physician in Greenport, New York
Dr. Fenig practices at Eastern Long Island Hospital in Greenport, New York.
Dr. Fenig's NPI, 1114101169, was assigned on December 27, 2007. Dr. Fenig holds New York license 267120.
NPI and contact details
- NPI
- 1114101169NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486779931
- NPI enumeration date
- December 27, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (631) 477-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Fenig practices at Eastern Long Island Hospital in Greenport, New York
Dr. Fenig's primary practice is Eastern Long Island Hospital, at 201 Manor Pl, Greenport, NY 11944 in Suffolk County. The practice phone is (631) 477-1000.
- Eastern Long Island Hospital201 Manor Pl, Greenport, NY 11944 · Suffolk CountyPhone(631) 477-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Fenig is affiliated with 5 sites of care and 5 medical groups
Dr. Fenig's primary practice is Eastern Long Island Hospital in Greenport, New York. Dr. Fenig is also affiliated with Memorial Sloan Kettering Cancer Center. The medical group on file is Stony Brook Emergency Physicians. Dmand AI also links Dr. Fenig to 1 more hospital, 4 medical groups and 2 group practices and clinics, each named with a free account.
Eastern Long Island HospitalPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Fenig's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fenig practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Eastern Long Island Hospital | Available with a free account |
| +4 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Fenig is one of 3,709 emergency medicine physicians in New York
Emergency medicine is Dr. Fenig's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Fenig's licenses on file in 2 states: New York and Georgia.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
- Georgia license
Emergency medicine physicians near Dr. Fenig
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
3,709emergency medicine physicians in New York
6emergency medicine physicians in Greenport
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Fenig billed Medicare for 369 services in 2024
CMS data shows 369 Medicare services from Dr. Fenig across 4 procedure codes in 2024, for 331 Medicare patients. Medicare paid $48,195 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024369
Medicare patients331
Paid by Medicare$48,195
Procedure codes4
Dr. Fenig's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2832024: 36930%
- Tests and treatments
- 2023: 122024: 0100%
Dr. Fenig compared with the New York median for emergency medicine physicians, 2024
- Dr. Fenig
- New York median
- Medicare services
- 369vs 21968% above
- Medicare patients
- 331vs 21653% above
- 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. Fenig'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.
Need commercial claims for Dr. Fenig?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fenig 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. Mark Fenig treated 331 Medicare patients in 2024, average age 80
CMS counts 331 Medicare patients who saw Dr. Fenig in 2024. The largest group is 85 and over, with 128 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.53, 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. Fenig's median patient age at 61, with 51% women.
Medicare patients, 2024331
Average age80
Average risk score1.53
Also on Medicaid13%
Dr. Fenig's Medicare patients by age, 2024
Dr. Fenig's Medicare patients by sex, 2024
- Women18155%
- Men15045%
Chronic conditions among Dr. Fenig's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Ischemic heart disease40%
- Mood disorders39%
- Anxiety37%
- Depression33%
- Atrial fibrillation29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fenig's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women51%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Fenig wrote 82 Medicare Part D claims in 2024
In 2024, Dr. Fenig wrote 82 Medicare Part D claims for 65 patients. 99% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $56 in total drug cost.
Part D claims, 202482
Drugs named by CMS1
Total drug cost$56
Part D patients65
Dr. Fenig's Part D claims by kind of drug, 2024
- Generic81 claims99%
- Brand-name and other1 claims1%
Dr. Fenig's most prescribed drugs by claims, 2022
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. Fenig's Part D claims, 2024
- Antibiotics50%41 of 82 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
How Dr. Mark Fenig takes part in Medicare
Dr. Fenig accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark Fenig has 3 publications on record
Dmand AI links 3 papers to Dr. Fenig, published from 2013 to 2017. Dr. Fenig's most frequent co-authors are Nicholas Dino Caputo, MD, MS, Lee Richard Donner, MD and Richard Iuorio, MD.
Papers3
Years published2013 to 2017
Dr. Fenig's most frequent co-authors
- Nicholas Dino Caputo, MD, MS1 shared paper
- Lee Richard Donner, MD1 shared paper
- Richard Iuorio, MD1 shared paper
Recent publications by Dr. Fenig
Ann Emerg Med
Back PainCervical VertebraeHypoglossal Nerve Diseases
See who Dr. Fenig researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fenig works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark Fenig received $23 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. Fenig from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $23.
Companies that paid Dr. Fenig the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Fenig'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 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) |
| 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) |
| 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. Mark Fenig
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. Mark Fenig's NPI number?
Dr. Mark Fenig's NPI number is 1114101169. It was assigned on December 27, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Fenig?
Dr. Mark Fenig is an emergency medicine physician in Greenport, New York. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Mark Fenig practice?
Dr. Fenig practices at 201 Manor Pl, Greenport, NY 11944. Dr. Fenig's primary practice is Eastern Long Island Hospital in Greenport, New York. Dmand AI also links Dr. Fenig to 1 hospital, 4 medical groups and 2 group practices and clinics.
What is Dr. Mark Fenig's office phone number?
The practice phone on file for Dr. Fenig is (631) 477-1000.
What is Dr. Mark Fenig's medical license number?
Dr. Fenig holds New York license 267120, one of the licenses on file in 2 states.
Which states has Dr. Mark Fenig been licensed in?
Dmand AI has state licenses on file for Dr. Fenig in New York and Georgia.
Which hospitals is Dr. Mark Fenig affiliated with?
Dr. Fenig is affiliated with Memorial Sloan Kettering Cancer Center. Dmand AI links Dr. Fenig to 1 more hospital.
What medical group is Dr. Mark Fenig part of?
Dr. Fenig is linked to Stony Brook Emergency Physicians. Dmand AI links Dr. Fenig to 4 more medical groups.
Does Dr. Mark Fenig accept Medicare?
Yes. CMS data shows Dr. Fenig billed Medicare for 369 services in 2024, and Dr. Fenig accepts Medicare assignment.
How many Medicare patients does Dr. Mark Fenig see?
CMS counts 331 Medicare patients who saw Dr. Fenig in 2024, with an average age of 80.
Show 6 more questionsShow fewer questions
What services does Dr. Mark Fenig bill to Medicare?
In 2024, Dr. Fenig's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and emergency department visit (99283).
What drugs does Dr. Mark Fenig prescribe most?
In 2022 Medicare Part D data, Dr. Fenig's most prescribed drugs by claims were Prednisone.
Has Dr. Mark Fenig received payments from drug or device companies?
CMS Open Payments shows $23 in general payments to Dr. Fenig from 1 company from 2022 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Mark Fenig been practicing?
Dr. Fenig graduated from medical school in 2007, 19 years ago.
Does Dr. Mark Fenig do research?
Dmand AI links 3 publications to Dr. Fenig, published from 2013 to 2017.
Who does Dr. Mark Fenig publish with?
Dr. Fenig's most frequent co-authors are Nicholas Dino Caputo, MD, MS (1 shared paper), Lee Richard Donner, MD (1 shared paper) and Richard Iuorio, MD (1 shared paper).
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