Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Lewis Dunleavy, MD

Adult Reconstructive Orthopaedic Surgery Physician in Princeton, NJ · enumerated 2018.

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

National Provider Identifier

1689165318

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Lewis Dunleavy

Credential MD

Sex Male

Practice address 325 Princeton Ave, Princeton, NJ, 08540

Phone (609) 924-8131

Enumeration date May 29, 2018

Last updated in NPPES Aug 26, 2024

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 25MA12311800 (NJ) Secondary

207XS0114X Adult Reconstructive Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 25MA12311800 (NJ) 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 Dunleavy?

The National Provider Identifier (NPI) for Mark Dunleavy is 1689165318, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Dunleavy practice?

The practice location on file with NPPES is in Princeton, NJ. 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 2024-08-26.