DR. MARK YASSA D.O.
NPI 1922488618
Obstetrics & Gynecology - Obstetrics in Massapequa, NY
About Dr. Mark Yassa D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK YASSA D.O. (NPI 1922488618) is an individual obstetrics provider in Massapequa, New York, licensed in New York (298557) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with Novant Health New Hanover Regional Medical Center, and maintains a secondary practice location in West Islip.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mark Yassa D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Mark Yassa reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Massapequa, NY 11758
- Reassigned Medicare billing, New York enrollment
- 944 clinicians in this Medicare group
Garden City, NY 11530
- Reassigned Medicare billing, New York enrollment
- 35 clinicians in this Medicare group
West Islip, NY 11795
- Reassigned Medicare billing, New York enrollment
- 395 clinicians in this Medicare group
Bronx, NY 10452
- Reassigned Medicare billing, New York enrollment
- 683 clinicians in this Medicare group
Jacksonville, NC 28546
- Reassigned Medicare billing, North Carolina enrollment
- 710 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Novant Health New Hanover Regional Medical Center
Acute Care Hospitals · Wilmington, NCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11758 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mark Yassa's NPI number?
The NPI number for Mark Yassa is 1922488618. It was assigned to this individual provider in the NPPES registry on June 8, 2015.
Where is Mark Yassa located?
Mark Yassa practices at 4150 Sunrise Hwy, Massapequa, NY 11758. The listed phone number is (516) 393-1000.
What is Mark Yassa's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Obstetrics, with taxonomy code 207VX0000X.
Is Mark Yassa enrolled in Medicare?
Yes. Mark Yassa is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mark Yassa's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Yassa reassigns Medicare benefits to 5 organizations: Chs Physician Partners, PC (Massapequa, NY), Bethpage Medical, PLLC (Garden City, NY), Good Samaritan Hospital Medical Center (West Islip, NY), Sun River Health Inc (Bronx, NY) and Novant Health Medical Group Coastal Region, LLC (Jacksonville, NC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Yassa's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Yassa accept?
Health plans from Blue Cross and Blue Shield of NC, Cigna Healthcare and UnitedHealthcare list Mark Yassa as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mark Yassa affiliated with any hospitals?
According to CMS data, Mark Yassa is affiliated with Novant Health New Hanover Regional Medical Center.
When was this NPI record last updated?
The NPPES record for Mark Yassa was last updated on June 25, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Mark Yassa, D.O. · NPI 1922488618
Obstetrics physician in Massapequa, New York. Individual provider, active in the CMS NPPES registry since June 8, 2015.
## Identity
- **NPI:** 1922488618 (Entity type: Individual)
- **Enumerated:** June 8, 2015
- **Primary specialty:** Obstetrics & Gynecology - Obstetrics · taxonomy 207VX0000X
- **State license:** 298557 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 4150 SUNRISE HWY, Massapequa, NY 11758-5303
- **Phone:** (516) 393-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Chs Physician Partners, PC (NPI 1992048342, Massapequa, NY); Bethpage Medical, PLLC (NPI 1205074739, Garden City, NY); Good Samaritan Hospital Medical Center (NPI 1902865355, West Islip, NY); Sun River Health Inc (NPI 1740763275, Bronx, NY); Novant Health Medical Group Coastal Region, LLC (NPI 1629738505, Jacksonville, NC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** June 25, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1922488618) · Data from the CMS NPPES public registry.