Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark F Sullivan Sr., MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Hagerstown, MD · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1497722615

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Registry record

Entity type Individual (Type 1)

Name Mark F Sullivan Sr.

Credential MD

Sex Male

Practice address 11236 Robinwood Dr, # 7, Hagerstown, MD, 21742

Phone (301) 665-4760

Fax (301) 665-4761

Enumeration date Mar 7, 2006

Last updated in NPPES Oct 18, 2020

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License MD038772E (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
11528138	Other	PA	AETNA
348403	Other	PA	HIGHMARK
0017873640003	Medicaid	PA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Mark Sullivan practice?

The practice location on file with NPPES is in Hagerstown, MD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mark Sullivan?

The National Provider Identifier (NPI) for Mark Sullivan is 1497722615, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-18.