Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1770306557 Individual Practitioner Male Practitioner

Marcus E. John , LCSW-C

Social Worker - School • Gaithersburg, MD

Professional Overview & Biography Verified Profile Summary

Marcus John, LCSW-C is a certified Social Worker - School practicing in Gaithersburg, MD. With approximately 6 years of clinical experience since completing medical education in 2020, Marcus John delivers high-quality medical care to the local community at 640 E DIAMOND AVE.

Marcus John does not directly accept Medicare assignment.

Practice Location & Contact Primary Location

Practice Address

640 E Diamond Ave

Gaithersburg, MD 208775323

Telephone 2023132397
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Other

Graduation Year

2020

Medicare Assignment

Not Specified

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Social Worker - School in Gaithersburg, MD

Experienced Practitioner (5-10 Yrs)
Practitioner Clinical Experience
6 Yrs -17.5 yrs vs City Avg
City Avg: 23.5 Yrs
State Avg: 18.6 Yrs
Regional Practice Density
7 Specialists

Practicing in Gaithersburg, MD (227 Statewide)

Telehealth Adoption Rate
14.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. John (6 Years) 6 Yrs
Gaithersburg Specialty Average (23.5 Years) 23.5 Yrs

Medical Specialties & State Licenses

CMS Verified: 2026-01-09
Social Worker - School Primary Specialty

NUCC Taxonomy Code: 1041S0200X

State License MD 26518

Definition to come...

Social Worker - Clinical

NUCC Taxonomy Code: 1041C0700X

State License MD 26518

A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

4 Associated Practitioners
Lauren Faherty , LMSW

Social Worker - School

NPI 1275379117

Licensed Master Social Worker

NPI 1437840212

Licensed Master Social Worker

Stephanie Mobley , LCSW-C

Social Worker - Clinical

NPI 1952126567

Licensed Clinical Social Worker - Certified

Sara Nakamura-Peek

Counselor - Mental Health

NPI 1962224816

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

8 Historical Events
👤
Provider Name / Credentials Updated January 09, 2026

Recorded as MARCUS JOHN, LCSW-C

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) January 09, 2026

Social Worker (License #26518 in MD)

NPI Profile Active November 01, 2024

NPI status registered as active in NPPES database

📍
Updated Practice Location November 01, 2024

Registered at 640 E DIAMOND AVE, GAITHERSBURG, MD 208775323 (Tel: 2023132397)

📍
Updated Business Mailing Address November 01, 2024

Registered at 12517 BREWSTER LN, BOWIE, MD 207152455 (Tel: 2023132397)

👤
Provider Name / Credentials Updated November 01, 2024

Recorded as MARCUS JOHN

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) November 01, 2024

Social Worker (License #26518 in MD)

🟢
Initial NPI Registration & Enumeration November 01, 2024

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1770306557
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: November 01, 2024
Last Update: January 09, 2026
Sole Proprietor: Yes

Mailing Address

12517 Brewster Ln

Bowie, MD 207152455

Phone: 2023132397

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.