Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Mark Yassa, DO

Individual provider Obstetrics Physician · NPI 1922488618

Dr. Mark Yassa, DO is an Obstetrics/Gynecology in Massapequa, New York. Qualified in 2015, 11 years ago. Practices with Novant Health Medical Group Coastal Region LLC, a 576-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
11
Licensed in
NY
In the registry since
2015
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

4150 Sunrise Hwy
Massapequa, NY 11758-5303
Phone: (516) 393-1000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1000 Montauk Hwy, West Islip, NY 11795-4927 — (631) 376-3000

Specialties & licences

Obstetrics Physician (primary) Taxonomy 207VX0000X · Licence 298557 (NY)

Record details

NPI number1922488618
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 8, 2015
Last updated in NPPESJune 25, 2019
Mailing address1000 Montauk Hwy, West Islip, NY 11795-4927

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Novant Health Medical Group Coastal Region Llc — 576 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount