Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark S Rosenthal, MD

Orthopaedic Surgery of the Spine Physician in Baltimore, MD · enumerated 2005.

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

National Provider Identifier

1215925474

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Registry record

Entity type Individual (Type 1)

Name Mark S Rosenthal

Credential MD

Sex Male

Practice address 2700 Quarry Lake Dr, Suite 300, Baltimore, MD, 21209

Phone (410) 377-8900

Fax (410) 377-3156

Enumeration date Oct 12, 2005

Last updated in NPPES Jun 6, 2020

Taxonomy & licenses

207XS0117X Orthopaedic Surgery of the Spine Physician Allopathic & Osteopathic Physicians · License D30667 (MD) Primary

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

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mark Rosenthal?

The National Provider Identifier (NPI) for Mark Rosenthal is 1215925474, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Rosenthal practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-06.