Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1487900858 Individual Practitioner Female Practitioner

Dr. Mary C Underhill , PsyD

Psychologist • Norman, OK

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Mary Underhill, PsyD is a certified Psychologist practicing in Norman, OK. With approximately 15 years of clinical experience since completing medical education in 2011, Dr. Underhill delivers high-quality medical care to the local community at 712 WALL ST.

Dr. Underhill is affiliated with Norman Behavioral Health Group, Llc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include psychiatric diagnostic evaluation, administration of psychological or neuropsychological test, administration of psychological or neuropsychological test, first. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

712 Wall St

Norman, OK 730696360

Telephone 4055797560
Fax 4055797563
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Other

Graduation Year

2011

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Psychologist in Norman, OK

Established Specialist (10-20 Yrs)
Practitioner Clinical Experience
15 Yrs -8.6 yrs vs City Avg
City Avg: 23.6 Yrs
State Avg: 27.1 Yrs
Regional Practice Density
41 Specialists

Practicing in Norman, OK (284 Statewide)

Telehealth Adoption Rate
9.8% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount
16.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Underhill (15 Years) 15 Yrs
Norman Specialty Average (23.6 Years) 23.6 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
90791 Psychiatric diagnostic evaluation
15 15 $186.00 $161.03
96137 Administration of psychological or neuropsychological test, each additional 30 minutes
14 14 $50.00 $31.93
96136 Administration of psychological or neuropsychological test, first 30 minutes
14 14 $50.00 $35.88
96130 Evaluation of psychological test, first hour
14 14 $120.00 $111.99

Medical Specialties & State Licenses

CMS Verified: 2026-07-08
Psychologist Primary Specialty

NUCC Taxonomy Code: 103T00000X

State License OK 1159

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.

Hospital & Practice Group Affiliations

Norman Behavioral Health Group, Llc

712 Wall St, Norman, OK 730696360

Phone: 4055797560

Practice Associates & Co-Workers

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

14 Associated Practitioners
Barbara Wright , LPC

Counselor - Professional

NPI 1154363216

Licensed Professional Counselor

Amy Ivy , NP

Nurse Practitioner - Psychiatric/Mental Health

NPI 1215799473

Nurse Practitioner

NPI 1215940267

Master of Science, Licensed Professional Counselor

Dr. Billy Sharp , PhD

Psychologist - Clinical

NPI 1225257447

Doctor of Philosophy (Ph.D.)

Dr. Alan Ivy , PhD

Psychologist - Counseling

NPI 1316134380

Doctor of Philosophy (Ph.D.)

Rose Williams , LPC

Counselor - Professional

NPI 1356781488

Licensed Professional Counselor

Career & Practice History Timeline

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

8 Historical Events
📍
Updated Practice Location July 08, 2026

Registered at 712 WALL ST, NORMAN, OK 730696360 (Tel: 4055797560)

📍
Updated Business Mailing Address July 08, 2026

Registered at 4201 FOX CROFT RD, NORMAN, OK 730260905 (Tel: 9545520388)

NPI Profile Active September 26, 2012

NPI status registered as active in NPPES database

📍
Updated Practice Location September 26, 2012

Registered at 1044 SW 4TH ST, MOORE, OK 731602405 (Tel: 4057356333)

📍
Updated Business Mailing Address September 26, 2012

Registered at 1044 SW 4TH ST, MOORE, OK 731602405 (Tel: 4057356333)

👤
Provider Name / Credentials Updated September 26, 2012

Recorded as MARY UNDERHILL, PSY.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) September 26, 2012

Psychologist (License #1159 in OK)

🟢
Initial NPI Registration & Enumeration August 03, 2012

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: 1487900858
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: August 03, 2012
Last Update: July 08, 2026
Sole Proprietor: No

Mailing Address

4201 Fox Croft Rd

Norman, OK 730260905

Phone: 9545520388

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.