Mark Yassa, D.O.
Obstetrics Physician · Massapequa, NY
Mark Yassa, D.O. is an obstetrics physician with a practice address in Massapequa, New York, and NPI 1922488618, issued on Jun 8, 2015. Check the license (New York 298557, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark Yassa
- Credential
- D.O.
- Primary taxonomy
- Obstetrics Physician 207VX0000X
- License number
- 298557 NY
Self-reported in NPPES; status is on the state search - Practice location
- 4150 Sunrise Hwy, Massapequa, NY 11758
- Phone
- (516) 393-1000
- Enumerated
- Jun 8, 2015
- Record last updated
- Jun 25, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20250324000093); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics physician records → All 118 in New York → Look up another NPI →
Also registered at 4150 Sunrise Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brooke BignallFamily Nurse Practitioner1194574830
- Sarah Burns, PAPhysician Assistant1265169577
- Nicole Capone, NPObstetrics & Gynecology Physician1003515834
- Michael Falkove, M.D.Internal Medicine Physician1053410621
- Julia Frangeskos, PA-CPhysician Assistant1104466721
- Robert Fuentes, M.D.Endocrinology, Diabetes & Metabolism Physician1376624288
Verify Mark Yassa 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 298557Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average obstetrics physician in 2024
47 Medicare Part D claims for 20 beneficiaries, against an average of 218 among the 863 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluconazole15 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.
Bills Medicare through one group practice
- Novant Health Medical Group Coastal Region LLCWilmington, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Yassa among 118 obstetrics physician records in New York
Mark Yassa, D.O. is one of 118 obstetrics physician records with a practice address in New York. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 86% of them.
- NPI issued2015 · 86% of these records are older, 9% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2015 · median 1999 among the 61 with a school on file
- Record last updated2019 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics Physician providers in New York
There are 118 obstetrics physician records in New York.
All 118 in New York → Every provider in Massapequa → Obstetrics Physician nationwide →
The 8 obstetrics physician records with the nearest ZIP codes
- Salil Bakshi, M.D.Oakdale, NY 117691033132741
- John Lopes, M.D.Oakdale, NY 117691417970112
- Patricia O'Sullivan, M.D.Oakdale, NY 117691891718508
- Rebecca Zucconi, M.D.Oakdale, NY 117691992710784
- Mitchell Kramer, MDHuntington Station, NY 117461821102971
- Carl Pillitteri, M.D.Port Jefferson, NY 117771295897346
- Catherine BeecherEast Setauket, NY 117331164841151
- Maxine Spicer, M.D.East Setauket, NY 117331992881718
Common questions
What is Mark Yassa, D.O.'s NPI number?
Mark Yassa, D.O.'s National Provider Identifier (NPI) is 1922488618, issued on Jun 8, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Mark Yassa, D.O. located?
The NPPES record lists a practice address at 4150 Sunrise Hwy, Massapequa, NY, 11758. Phone: (516) 393-1000. Providers update this record themselves, so call before visiting.
How can I verify Mark Yassa, D.O.'s license?
NPPES lists New York license number 298557, 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 Yassa, D.O. prescribe under Medicare Part D?
In 2024, Mark Yassa, D.O. had 47 Medicare Part D claims for 20 beneficiaries; the average among obstetrics physician prescribers was 218. Part D covers Medicare prescriptions only.
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.