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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. LEONARD CHARLES MARCUS M.D.
NPI 1548236722
Specialist in Newton, MA

Active since February 27, 2006
1555 COMMONWEALTH AVE, NEWTON, MA 02465(617) 527-4003(617) 964-6111 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Leonard Charles Marcus M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LEONARD CHARLES MARCUS M.D. (NPI 1548236722) is an individual specialist in Newton, Massachusetts, licensed in Massachusetts (33315) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1548236722
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. LEONARD CHARLES MARCUSCredential: M.D.
Location Address1555 COMMONWEALTH AVENewton, MA 02465-2800
Mailing Address1555 Commonwealth AveNewton, MA 02465-2800 · (617) 527-4003 · Fax (617) 964-6111
Phone(617) 527-4003
Fax(617) 964-6111
Sole ProprietorNo
Enumeration DateFebruary 27, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1548236722 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in MA · 33315
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
1555 COMMONWEALTH AVE, Newton, MA 02465
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Other Identifiers 1

Medicaid2029596MA

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Leonard Marcus's NPI number?

The NPI number for Leonard Marcus is 1548236722. It was assigned to this individual provider in the NPPES registry on February 27, 2006.

Where is Leonard Marcus located?

Leonard Marcus practices at 1555 Commonwealth Ave, Newton, MA 02465. The listed phone number is (617) 527-4003.

What is Leonard Marcus's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

When was this NPI record last updated?

The NPPES record for Leonard Marcus was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.