Dr. Marion Phoummarath Zahn , PhD
Psychologist • Katy, TX
Professional Overview & Biography Verified Profile Summary
Dr. Marion Zahn, PhD is a registered healthcare professional specializing in Psychologist in Katy, TX. Practice services are available at 24044 CINCO VILLAGE CENTER BLVD under active NPI credentials.
Practice Location & Contact Primary Location
24044 Cinco Village Center Blvd
Suite 100
Katy, TX 774948432
Specialty Benchmarks & Practice Insights
Comparative analytics for Psychologist in Katy, TX
Practicing in Katy, TX (2266 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
CMS Verified: 2026-01-27NUCC Taxonomy Code: 103T00000X
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.
NUCC Taxonomy Code: 103T00000X
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
Secondary Practice Locations
9302 E 22nd St
Tucson, AZ 857107342
Phone: 5202785758
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Speech-Language Pathologist
Master of Science, Speech-Language Pathologist (Certificate of Clinical Competence)
Social Worker - Clinical
LCSWS
Counselor - Mental Health
Doctor of Psychology (Psy.D.), Licensed Professional Counselor
Nurse Practitioner - Psychiatric/Mental Health
Marriage & Family Therapist
Licensed Marriage and Family Therapist
Chiropractor
Doctor of Chiropractic
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Psychologist (License #7661 in None)
NPI status registered as active in NPPES database
Registered at 24044 CINCO VILLAGE CENTER BLVD, SUITE 100, KATY, TX 774948432 (Tel: 7139751222)
Registered at 24044 CINCO VILLAGE CENTER BLVD, SUITE 100, KATY, TX 774948432 (Tel: 7139751222)
Recorded as MARION ZAHN, PH.D.
Psychologist (License #34861 in TX)
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
24044 Cinco Village Center Blvd, Suite 100
Katy, TX 774948432
Phone: 7139751222
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