Mark A. Halsey, MD
Dermatology Physician · Sag Harbor, NY
Mark A. Halsey, MD is a dermatology physician with a practice address in Sag Harbor, New York, and NPI 1790070480, issued on Jun 10, 2011. Check the license (New York 282033, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark A. Halsey
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 282033 NY
Self-reported in NPPES; status is on the state search - Practice location
- 3350 Noyac RD, Sag Harbor, NY 11963
- Phone
- (631) 731-1099
- Enumerated
- Jun 10, 2011
- Record last updated
- Aug 5, 2025
- Medicaid ID
- 05078079 NY
- Medicare enrollment
- Enrolled (PECOS I20160803000235); accepts Medicare assignment
- Medical or professional school
- University Of South Florida College Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 1,211 in New York → Look up another NPI →
Also registered at 3350 Noyac RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tatum Albrecht, PAPhysician Assistant1780534040
- Laura Hagerman, LPNLicensed Practical Nurse1255281440
- Michelle MesaRegistered Nurse1487539151
- Ashton WilsonPhysician Assistant1295402337
Verify Mark A. Halsey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 282033Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average dermatology physician in 2024
735 Medicare Part D claims for 286 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Ketoconazole131 claims
- Minoxidil52 claims
- Triamcinolone Acetonide50 claims
- Clindamycin Phosphate48 claims
- Hydrocortisone40 claims
- Clobetasol Propionate39 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Sagaponack Medical PCSag Harbor, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Halsey among 1,211 dermatology physician records in New York
Mark A. Halsey, MD is one of 1,211 dermatology physician records with a practice address in New York. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 65% of them.
- NPI issued2011 · 65% of these records are older, 31% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2011 · median 2004 among the 880 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 dermatology physician record lists a practice address in Sag Harbor
They are 1 of the 83 NPPES records with a practice address in Sag Harbor, and 1,211 dermatology physician records in New York.
All 1,211 in New York → Every provider in Sag Harbor → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Ariel Abraham, M.D.Southampton, NY 119681548503063
- Mahmud Alkul, MDSouthampton, NY 119681437808540
- Robert Weinberg, M.D.Southampton, NY 119681518906304
- Antoinette Notaro, M.D.Mattituck, NY 119521922003920
- Raymond Fertig, MDAltamont, NY 120091477040640
- Ahmed Hawash, MD, PHDAltamont, NY 120091003376658
- Theta Pattison, MDAltamont, NY 120091841298510
- Raj Tuppal, MDAltamont, NY 120091629922125
Common questions
What is Mark A. Halsey, MD's NPI number?
Mark A. Halsey, MD's National Provider Identifier (NPI) is 1790070480, issued on Jun 10, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Halsey, MD located?
The NPPES record lists a practice address at 3350 Noyac RD, Sag Harbor, NY, 11963. Phone: (631) 731-1099. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Halsey, MD's license?
NPPES lists New York license number 282033, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark A. Halsey, MD prescribe under Medicare Part D?
In 2024, Mark A. Halsey, MD had 735 Medicare Part D claims for 286 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Mark A. Halsey, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.