Dr. Brian Joseph McMahon, MD
- Medicare services, 2024
- 427
- Medicare patients, 2024
- 446
- Part D claims, 2024
- 34
- Hospital affiliations
- 2
- Industry payments
- $1,258
- Practice address
- Health Sciences Center Suny, Stony Brook, NY 11794
- Practice phone
- Call (631) 444-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. McMahon's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Brian Joseph McMahon is an emergency medicine physician in Stony Brook, New York
Dr. McMahon practices at Stony Brook University Hospital in Stony Brook, New York, part of Stony Brook University.
Dr. McMahon's NPI, 1801839550, was assigned on June 13, 2006. Dr. McMahon graduated from New York Medical College in 1999. Dr. McMahon holds New York license 224721.
- NPI
- 1801839550NPI Registry (opens in a new tab)
- NPI enumeration date
- June 13, 2006
- NPI status
- Active
- Practice phone
- (631) 444-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Brian Joseph McMahon practices at 2 locations in Stony Brook, New York
Dr. McMahon's primary practice is Stony Brook University Hospital, at Health Sciences Center Suny, Stony Brook, NY 11794 in Suffolk County. The practice phone is (631) 444-4000. Dr. McMahon also practices at Stony Brook University Hospital, 101 Nicolls Rd, Stony Brook, NY 11794.
- Stony Brook University HospitalPrimaryHealth Sciences Center Suny, Stony Brook, NY 11794 · Suffolk CountyPhone(631) 444-4000
- Stony Brook University Hospital101 Nicolls Rd, Stony Brook, NY 11794 · Suffolk CountyPhone(631) 444-4100
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Brian Joseph McMahon is affiliated with 3 sites of care and 1 medical group
Dr. McMahon's primary practice is Stony Brook University Hospital in Stony Brook, New York, part of Stony Brook University. Dr. McMahon is also affiliated with NYU Langone Hospital-Suffolk. The medical group on file is Stony Brook Emergency Physicians. Dmand AI also links Dr. McMahon to 1 more clinical lab, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Brian Joseph McMahon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMahon practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stony Brook University Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Stony Brook University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Brian Joseph McMahon is one of 3,709 emergency medicine physicians in New York
Emergency medicine is Dr. McMahon's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. McMahon is licensed in New York.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
Emergency medicine physicians near Dr. McMahon
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. Brian Joseph McMahon billed Medicare for 427 services in 2024
CMS data shows 427 Medicare services from Dr. McMahon across 2 procedure codes in 2024, for 446 Medicare patients. Medicare paid $60,819 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. McMahon's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4492024: 4275%
Dr. McMahon compared with the New York median for emergency medicine physicians, 2024
- Dr. McMahon
- New York median
- Medicare services
- 427vs 21995% above
- Medicare patients
- 446vs 2162.1 times
- Part D claims
- 11vs 2962% below
Medians across 3,510 emergency medicine physicians in New York with Dmand AI profiles that report each measure.
Dr. McMahon'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. Brian Joseph McMahon treated 446 Medicare patients in 2024, average age 76
CMS counts 446 Medicare patients who saw Dr. McMahon in 2024. The largest group is 75 to 84, with 173 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 2.06, 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. McMahon's median patient age at 54, with 56% women.
Dr. McMahon's Medicare patients by age, 2024
Dr. McMahon's Medicare patients by sex, 2024
- Women23753%
- Men20947%
Chronic conditions among Dr. McMahon's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis60%
- Ischemic heart disease52%
- Mood disorders45%
- Diabetes43%
- Depression41%
- Anxiety40%
Share of Medicare patients with each condition. A patient can have several.
Dr. McMahon's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women56%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brian Joseph McMahon wrote 34 Medicare Part D claims in 2024
In 2024, Dr. McMahon wrote 34 Medicare Part D claims for 28 patients. 97% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $62 in total drug cost. In 2018, CMS named 11 claims across 1 drug.
Dr. McMahon's Part D claims by kind of drug, 2024
- Generic33 claims97%
- Brand-name and other1 claims3%
Dr. McMahon's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 112019: 11No change
Drugs named by CMS: 1 in 2019, 1 in 2018.
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
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Dr. Brian Joseph McMahon received $1,258 in industry payments from 2022 to 2025
CMS Open Payments shows 22 general payments to Dr. McMahon from 5 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 61% of the total. AstraZeneca Pharmaceuticals LP paid the most, $1,142.
General payments to Dr. McMahon by program year, 2022 to 2025
General payments to Dr. McMahon by kind, 2022 to 2025
- Food and beverage$77061%
- Travel and lodging$47037%
- Education$181%
Companies that paid Dr. McMahon the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Brian Joseph McMahon graduated from New York Medical College
Dr. McMahon graduated from New York Medical College in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Brian Joseph McMahon'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 Affiliation DataDmand AI Practice 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) |
| 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. Brian Joseph McMahon
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. Brian Joseph McMahon's NPI number?
Dr. Brian Joseph McMahon's NPI number is 1801839550. It was assigned on June 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Brian Joseph McMahon?
Dr. Brian Joseph McMahon is an emergency medicine physician in Stony Brook, New York. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Brian Joseph McMahon practice?
Dr. McMahon practices at Health Sciences Center Suny, Stony Brook, NY 11794. Dr. McMahon also practices at 101 Nicolls Rd, Stony Brook, NY 11794. Dr. McMahon's primary practice is Stony Brook University Hospital in Stony Brook, New York, part of Stony Brook University. Dmand AI also links Dr. McMahon to 1 clinical lab.
What is Dr. Brian Joseph McMahon's office phone number?
The practice phone on file for Dr. McMahon is (631) 444-4000.
What is Dr. Brian Joseph McMahon's medical license number?
Dr. McMahon holds New York license 224721.
Which hospitals is Dr. Brian Joseph McMahon affiliated with?
Dr. McMahon practices at Stony Brook University Hospital in Stony Brook, New York. Dr. McMahon is also affiliated with NYU Langone Hospital-Suffolk.
What medical group is Dr. Brian Joseph McMahon part of?
Dr. McMahon is linked to Stony Brook Emergency Physicians.
Does Dr. Brian Joseph McMahon accept Medicare?
Yes. CMS data shows Dr. McMahon billed Medicare for 427 services in 2024.
How many Medicare patients does Dr. Brian Joseph McMahon see?
CMS counts 446 Medicare patients who saw Dr. McMahon in 2024, with an average age of 76.
What services does Dr. Brian Joseph McMahon bill to Medicare?
In 2024, Dr. McMahon's most billed Medicare services were emergency department visit (99285) and emergency department visit (99284).
Show 4 more questionsShow fewer questions
Where did Dr. Brian Joseph McMahon go to medical school?
Dr. McMahon graduated from New York Medical College in 1999.
What drugs does Dr. Brian Joseph McMahon prescribe most?
In 2019 Medicare Part D data, Dr. McMahon's most prescribed drugs by claims were Cephalexin.
Has Dr. Brian Joseph McMahon received payments from drug or device companies?
CMS Open Payments shows $1,258 in general payments to Dr. McMahon from 5 companies from 2022 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Brian Joseph McMahon been practicing?
Dr. McMahon graduated from medical school in 1999, 27 years ago.
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