Alyssa Marianna Brennan
- Part D claims, 2024
- 485
- Industry payments
- $9,358
- Affiliated sites
- 2
- Medical groups
- 2
- State license
- 1
- Practice address
- 240 Meeting House Ln, Southampton, NY 11968
- Practice phone
- Call (631) 726-8200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southampton Hospital
Southampton, New York
Find Alyssa Brennan'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.
Alyssa Marianna Brennan is a dermatologist in Southampton, New York
Alyssa Brennan practices at Southampton Hospital in Southampton, New York.
Alyssa Brennan's NPI, 1487254090, was assigned on November 1, 2020. Alyssa Brennan graduated from Stony Brook University Health Sciences Center School of Medicine in 2020. Alyssa Brennan holds New York license 025626.
- NPI
- 1487254090NPI Registry (opens in a new tab)
- NPI enumeration date
- November 1, 2020
- NPI status
- Active
- Practice phone
- (631) 726-8200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Alyssa Marianna Brennan practices at Southampton Hospital in Southampton, New York
Alyssa Brennan's primary practice is Southampton Hospital, at 240 Meeting House Ln, Southampton, NY 11968 in Suffolk County. The practice phone is (631) 726-8200.
- Southampton Hospital240 Meeting House Ln, Southampton, NY 11968 · Suffolk CountyPhone(631) 726-8200
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Alyssa Marianna Brennan is affiliated with 3 sites of care and 2 medical groups
Alyssa Brennan's primary practice is Southampton Hospital in Southampton, New York. The medical group on file is MDCS: Manhattan Dermatology and Cosmetic Surgery. Dmand AI also links Alyssa Brennan to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Alyssa Marianna Brennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Alyssa Brennan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southampton Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Alyssa Marianna Brennan is one of 1,038 dermatologists in New York
Dermatology is Alyssa Brennan's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Alyssa Brennan is licensed in New York.
Specialties and state licenses
- Dermatology, New YorkPrimary
Dermatologists near Alyssa Brennan
Counts of dermatologists 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
Alyssa Marianna Brennan's patients have a median age of 58
Across all payers, Dmand AI patient panel data puts Alyssa Brennan's median patient age at 58, with 62% women.
Alyssa Brennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women62%
- Men36%
Source: Dmand AI Patient Panel Data
Alyssa Marianna Brennan wrote 485 Medicare Part D claims in 2024
In 2024, Alyssa Brennan wrote 485 Medicare Part D claims for 233 patients. 92% of them were for generic drugs. CMS names the drug for 361 of them, across 13 drugs with 11 or more claims each, at $5,715 in total drug cost. In 2023, CMS named 449 claims across 13 drugs.
Alyssa Brennan's Part D claims by kind of drug, 2024
- Generic444 claims92%
- Brand-name41 claims8%
Alyssa Brennan'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 Alyssa Brennan's Part D claims, 2024
- Antibiotics7%34 of 485 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: 4492024: 36120%
Drugs named by CMS: 13 in 2024, 13 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
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Alyssa Marianna Brennan received $9,358 in industry payments from 2021 to 2025
CMS Open Payments shows 342 general payments to Alyssa Brennan from 23 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 97% of the total. Abbvie Inc. paid the most, $2,114.
General payments to Alyssa Brennan by program year, 2021 to 2025
General payments to Alyssa Brennan by kind, 2021 to 2025
- Food and beverage$9,10297%
- Education$2563%
Companies that paid Alyssa Brennan the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Alyssa Marianna Brennan graduated from Stony Brook University Health Sciences Center School of Medicine
Alyssa Brennan graduated from Stony Brook University Health Sciences Center School of Medicine in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Alyssa Marianna Brennan'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 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)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 Alyssa Marianna Brennan
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What is Alyssa Marianna Brennan's NPI number?
Alyssa Marianna Brennan's NPI number is 1487254090. It was assigned on November 1, 2020, and it is active in the NPI Registry.
What does Alyssa Marianna Brennan specialize in?
Alyssa Marianna Brennan is a dermatologist in Southampton, New York. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Alyssa Marianna Brennan practice?
Alyssa Brennan practices at 240 Meeting House Ln, Southampton, NY 11968. Alyssa Brennan's primary practice is Southampton Hospital in Southampton, New York. Dmand AI also links Alyssa Brennan to 2 group practices and clinics and 1 medical group.
What is Alyssa Marianna Brennan's office phone number?
The practice phone on file for Alyssa Brennan is (631) 726-8200.
What is Alyssa Marianna Brennan's medical license number?
Alyssa Brennan holds New York license 025626.
What medical group is Alyssa Marianna Brennan part of?
Alyssa Brennan is linked to MDCS: Manhattan Dermatology and Cosmetic Surgery. Dmand AI links Alyssa Brennan to 1 more medical group.
Where did Alyssa Marianna Brennan go to medical school?
Alyssa Brennan graduated from Stony Brook University Health Sciences Center School of Medicine in 2020.
What drugs does Alyssa Marianna Brennan prescribe most?
In 2024 Medicare Part D data, Alyssa Brennan's most prescribed drugs by claims were Triamcinolone Acetonide, Clobetasol Propionate and Mupirocin.
Has Alyssa Marianna Brennan received payments from drug or device companies?
CMS Open Payments shows $9,358 in general payments to Alyssa Brennan from 23 companies from 2021 to 2025. The largest total came from Abbvie Inc.
How long has Alyssa Marianna Brennan been practicing?
Alyssa Brennan graduated from medical school in 2020, 6 years ago.
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