Marcus John, LCSW-C
NPI 1770306557 · School Social Worker · Gaithersburg, MD
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus John, LCSW-C is a School Social Worker provider in Gaithersburg, MD (NPI 1770306557).
Provider details
- NPI number
- 1770306557
- Entity type
- Individual
- Primary specialty
- School Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW-C
- Sex
- Male
- Sole proprietor
- Yes
- License
- 26518 (MD)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-11-01
- Last updated
- 2026-01-09
- Certified
- 2026-01-09
Frequently asked questions
- What is Marcus John's NPI number?
- Marcus John's National Provider Identifier (NPI) is 1770306557, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus John's specialty?
- Marcus John is listed in the NPPES registry with a primary specialty of School Social Worker (Behavioral Health & Social Service Providers).
- Where is Marcus John located?
- Marcus John's practice location on file with NPPES is 640 E Diamond Ave, Gaithersburg, MD 20877-5323.
- What is Marcus John's phone number?
- The practice phone number listed in the NPPES registry for Marcus John is (202) 313-2397.
- Does Marcus John accept Medicare?
- Marcus John is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus John's NPI active?
- Yes — Marcus John's NPI (1770306557) is active in the NPPES registry as of the last update on 2026-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.