Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1154365955 Individual Practitioner Male Practitioner

Roy C Marks , MA, LCSW

Psychologist • Saint Louis, MO

Professional Overview & Biography Verified Profile Summary

Roy Marks, MA, LCSW is a registered healthcare professional specializing in Psychologist in Saint Louis, MO. Practice services are available at 5524 GRANT PL under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

5524 Grant Pl

Saint Louis, MO 631163304

Telephone 3147212155
Fax 3144570611

Specialty Benchmarks & Practice Insights

Comparative analytics for Psychologist in Saint Louis, MO

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 19.9 Yrs
State Avg: 26.6 Yrs
Regional Practice Density
144 Specialists

Practicing in Saint Louis, MO (635 Statewide)

Telehealth Adoption Rate
9.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

CMS Verified: 2021-07-19
Psychologist Primary Specialty

NUCC Taxonomy Code: 103T00000X

State License MO 002304

A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
498301100 (MO)

Career & Practice History Timeline

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

8 Historical Events
📍
Updated Practice Location July 19, 2021

Registered at 5524 GRANT PL, SAINT LOUIS, MO 631163304 (Tel: 3147212155)

📍
Updated Business Mailing Address July 19, 2021

Registered at 5524 GRANT PL, SAINT LOUIS, MO 631163304 (Tel: 3147212155)

NPI Profile Active July 09, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 09, 2007

Registered at 135 W ADAMS AVE, SAINT LOUIS, MO 631224043 (Tel: 3148211771)

📍
Updated Business Mailing Address July 09, 2007

Registered at 135 W ADAMS AVE, SAINT LOUIS, MO 631224043 (Tel: 3148211771)

👤
Provider Name / Credentials Updated July 09, 2007

Recorded as ROY MARKS, M.A., L.C.S.W.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 09, 2007

Psychologist (License #002304 in MO)

🟢
Initial NPI Registration & Enumeration June 15, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1154365955
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 15, 2006
Last Update: August 09, 2026
Sole Proprietor: No

Mailing Address

5524 Grant Pl

Saint Louis, MO 631163304

Phone: 3147212155

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.