MARCUS E. JOHN LCSW-C
NPI 1770306557
Social Worker - School in Gaithersburg, MD
About Marcus E. John Lcsw-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARCUS E. JOHN LCSW-C (NPI 1770306557) is an individual school provider in Gaithersburg, Maryland, licensed in Maryland (26518) and active in the NPI registry since November 2024. He is enrolled in Medicare PECOS and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Marcus E. John Lcsw-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Marcus John's NPI number?
The NPI number for Marcus John is 1770306557. It was assigned to this individual provider in the NPPES registry on November 1, 2024.
Where is Marcus John located?
Marcus John practices at 640 E Diamond Ave, Gaithersburg, MD 20877. The listed phone number is (202) 313-2397.
What is Marcus John's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in School, with taxonomy code 1041S0200X.
Is Marcus John enrolled in Medicare?
Yes. Marcus John is registered in the Medicare PECOS enrollment system.
When was this NPI record last updated?
The NPPES record for Marcus John was last updated on January 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.
# Marcus E. John, LCSW-C · NPI 1770306557
School provider in Gaithersburg, Maryland. Individual provider, active in the CMS NPPES registry since November 1, 2024.
## Identity
- **NPI:** 1770306557 (Entity type: Individual)
- **Enumerated:** November 1, 2024
- **Primary specialty:** Social Worker - School · taxonomy 1041S0200X
- **State license:** 26518 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 640 E DIAMOND AVE, Gaithersburg, MD 20877-5323
- **Phone:** (202) 313-2397
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** January 9, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1770306557) · Data from the CMS NPPES public registry.