Dr. Francis G. Mas, MD
- Part D claims, 2024
- 2,034
- Publications
- 1
- Industry payments
- $669
- State license
- 1
- Year NPI issued
- 2007
- 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 Dr. Mas' 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. Francis G. Mas is a psychiatrist in Southampton, New York
Dr. Mas practices at Southampton Hospital in Southampton, New York.
Dr. Mas' NPI, 1043431471, was assigned on May 2, 2007. Dr. Mas holds New York license 116188.
- NPI
- 1043431471NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284759002
- NPI enumeration date
- May 2, 2007
- NPI status
- Active
- Practice phone
- (631) 726-8200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 85
- Medical school graduation
- 1967
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Francis G. Mas practices at Southampton Hospital in Southampton, New York
Dr. Mas' 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
Dr. Francis G. Mas is affiliated with 1 site of care
Dr. Mas' primary practice is Southampton Hospital in Southampton, New York.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Francis G. Mas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mas practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southampton Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Francis G. Mas is one of 4,448 psychiatrists in New York
Psychiatry is Dr. Mas' primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Mas is licensed in New York.
Specialties and state licenses
- Psychiatry, New YorkPrimary
Psychiatrists near Dr. Mas
Counts of psychiatrists 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. Francis G. Mas' patients have a median age of 49
Across all payers, Dmand AI patient panel data puts Dr. Mas' median patient age at 49, with 48% women.
Dr. Mas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women48%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. Francis G. Mas wrote 2,034 Medicare Part D claims in 2024
In 2024, Dr. Mas wrote 2,034 Medicare Part D claims for 126 patients. 93% of them were for generic drugs. CMS names the drug for 1,835 of them, across 45 drugs with 11 or more claims each, at $70,822 in total drug cost. In 2023, CMS named 1,630 claims across 38 drugs.
Dr. Mas' Part D claims by kind of drug, 2024
- Generic1,898 claims93%
- Brand-name136 claims7%
Dr. Mas' 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 Dr. Mas' Part D claims, 2024
- Antipsychotics, patients 65 and over14%280 of 2,034 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: 1,6302024: 1,83513%
Drugs named by CMS: 45 in 2024, 38 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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Dr. Francis G. Mas has 1 publication on record
Dmand AI links 1 paper to Dr. Mas in 2020.
Recent publications by Dr. Mas
See who Dr. Mas researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mas works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Francis G. Mas received $669 in industry payments from 2016 to 2023
CMS Open Payments shows 40 general payments to Dr. Mas from 7 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Sunovion Pharmaceuticals Inc. paid the most, $339.
General payments to Dr. Mas by program year, 2016 to 2023
Companies that paid Dr. Mas the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Francis G. Mas'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 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) |
| 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. Francis G. Mas
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. Francis G. Mas' NPI number?
Dr. Francis G. Mas' NPI number is 1043431471. It was assigned on May 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Francis G. Mas?
Dr. Francis G. Mas is a psychiatrist in Southampton, New York. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Francis G. Mas practice?
Dr. Mas practices at 240 Meeting House Ln, Southampton, NY 11968. Dr. Mas' primary practice is Southampton Hospital in Southampton, New York.
What is Dr. Francis G. Mas' office phone number?
The practice phone on file for Dr. Mas is (631) 726-8200.
What is Dr. Francis G. Mas' medical license number?
Dr. Mas holds New York license 116188.
What drugs does Dr. Francis G. Mas prescribe most?
In 2024 Medicare Part D data, Dr. Mas' most prescribed drugs by claims were Clonazepam, Lamotrigine and Lorazepam.
Has Dr. Francis G. Mas received payments from drug or device companies?
CMS Open Payments shows $669 in general payments to Dr. Mas from 7 companies from 2016 to 2023. The largest total came from Sunovion Pharmaceuticals Inc.
How long has Dr. Francis G. Mas been practicing?
Dr. Mas graduated from medical school in 1967, 59 years ago.
Does Dr. Francis G. Mas do research?
Dmand AI links 1 publication to Dr. Mas.
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