Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mark Cleary

Q: What is the NPI number for Mark Cleary?

The National Provider Identifier (NPI) for Mark Cleary is 1023467438, a Type 1 (individual) record in the CMS NPPES registry.

Diagnostic Radiology Physician in South Weymouth, MA · enumerated 2016.

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

National Provider Identifier

1023467438

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Registry record

Entity type Individual (Type 1)

Name Mark Cleary

Sex Male

Practice address South Weymouth, MA, 02190

Phone (781) 624-8000

Fax (781) 624-3719

Enumeration date Jun 7, 2016

Last updated in NPPES Feb 13, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 286497 (MA) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 267404 (MA) Secondary

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 Cleary?

The National Provider Identifier (NPI) for Mark Cleary is 1023467438, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Cleary practice?

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

Other providers at this practice address

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Joseph Lenehan Plastic and Reconstructive Surgery Physician · South Weymouth, MA NPI 1699773135 Joseph M. Lenehan MD PC Plastic and Reconstructive Surgery Physician · South Weymouth, MA NPI 1750389664 Michael Ennis Certified Registered Nurse Anesthetist · Weymouth, MA NPI 1346241288 Richard Mirel Endocrinology, Diabetes & Metabolism Physician · Weymouth, MA NPI 1437150174 Matthew Weiss Critical Care Medicine (Internal Medicine) Physician · South Weymouth, MA NPI 1205829967 Michael Hayes Neurology Physician · South Weymouth, MA NPI 1689663338 Troy Demasters Physician Assistant · Weymouth, MA NPI 1427048891 Clifford Breslow Anesthesiology Physician · South Weymouth, MA NPI 1639169758

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-13.