NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Leo M Cass Mdpc

Internal Medicine Physician in Winchester, MA · enumerated 2006 · authorized official Leo Cass, President/Physician.

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

National Provider Identifier

1376564534

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Leo M Cass Mdpc
Practice address 223 Swanton St, Winchester, MA, 01890
Fax (781) 729-2297
Enumeration date Jul 22, 2006
Last updated in NPPES Mar 17, 2018

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 33744 (MA) Primary

Authorized official

Name Leo Cass
Title President/Physician

Other identifiers

Identifier Type State Issuer
9719253 Medicaid MA -

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 Leo M Cass Mdpc?
The NPI for Leo M Cass Mdpc is 1376564534, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Leo M Cass Mdpc?
NPPES lists Leo Cass (President/Physician) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-17.