Leonard Charles Marcus, M.D.
Specialist · Newton, MA
Leonard Charles Marcus, M.D. is a specialist with a practice address in Newton, Massachusetts, and NPI 1548236722, issued on Feb 27, 2006. Check the license (Massachusetts 33315, as entered in NPPES) with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Leonard Charles Marcus
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 33315 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1555 Commonwealth Ave, Newton, MA 02465
- Phone
- (617) 527-4003
- Enumerated
- Feb 27, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (617) 964-6111
- Medicaid ID
- 2029596 MA
- Entity
- Type 1 · individual
8 nearest specialist records → All 1,096 in Massachusetts → Look up another NPI →
Verify Leonard Charles Marcus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 33315Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Leonard Charles Marcus among 1,096 specialist records in Massachusetts
Leonard Charles Marcus, M.D. is one of 1,096 specialist records with a practice address in Massachusetts. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 69% newer
- In a Medicare fileNo · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2026 · 82% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in Massachusetts
There are 1,096 specialist records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,096 in Massachusetts → Every provider in Newton → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Arthur Barsky, M.D.W Newton, MA 024651396746681
- Wendy Milot, MS OTR/LWest Newton, MA 024651043463516
- Kristen Allen, ATCChestnut Hill, MA 024671215002886
- Erin Brennen, ATCChestnut Hill, MA 024671477514685
- Salin Dahlben, M.D.Chestnut Hill, MA 024671962471714
- Bert Lenz, LATCChestnut Hill, MA 024671184773483
- Mikhail Mazo, M.D.Newton, MA 024671740231216
- Irina Mezhebovsky, M.D.Brookline, MA 024671114981073
Common questions
What is Leonard Charles Marcus, M.D.'s NPI number?
Leonard Charles Marcus, M.D.'s National Provider Identifier (NPI) is 1548236722, issued on Feb 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Charles Marcus, M.D. located?
The NPPES record lists a practice address at 1555 Commonwealth Ave, Newton, MA, 02465. Phone: (617) 527-4003. Providers update this record themselves, so call before visiting.
How can I verify Leonard Charles Marcus, M.D.'s license?
NPPES lists Massachusetts license number 33315, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.