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

Mark F Sullivan Sr., MD

Individual provider Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · NPI 1497722615

Mark F Sullivan Sr., MD is a Thoracic Surgery in Hagerstown, Maryland. Graduated from Georgetown University School of Medicine in 1983, 43 years ago. Practices with Meritus Medical Center Inc, a 746-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
43
Trained at
Georgetown University School of Medicine
Licensed in
PA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

11236 Robinwood Dr # 7
Hagerstown, MD 21742-6708
Phone: (301) 665-4760
Fax: (301) 665-4761
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (primary) Taxonomy 208G00000X · Licence MD038772E (PA)

Record details

NPI number1497722615
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 7, 2006
Last updated in NPPESOctober 18, 2020
Certification dateOctober 18, 2020
Mailing address322 E Antietam St, Ste 106, Hagerstown, MD 21740-5736

Medicare enrollment

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

Medicare specialtyTHORACIC SURGERY
Also practisesGENERAL SURGERY
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1983 (43 years in practice)
Group practice Meritus Medical Center Inc — 746 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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