Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1639688476 Individual Practitioner Female Practitioner

Dr. Harriet Singelyn , PsyD

Psychologist • Keller, TX

Professional Overview & Biography Verified Profile Summary

Dr. Harriet Singelyn, PsyD is a registered healthcare professional specializing in Psychologist in Keller, TX. Practice services are available at 1710 KELLER PKWY # 4759 under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

1710 Keller Pkwy # 4759

Keller, TX 762483749

Telephone 2102012364

Specialty Benchmarks & Practice Insights

Comparative analytics for Psychologist in Keller, TX

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 10.5 Yrs
State Avg: 22.8 Yrs
Regional Practice Density
6 Specialists

Practicing in Keller, TX (2266 Statewide)

Telehealth Adoption Rate
0.0% 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: 2025-11-24
Psychologist Primary Specialty

NUCC Taxonomy Code: 103T00000X

State License TX 39356

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.

Career & Practice History Timeline

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

12 Historical Events
📍
Updated Practice Location November 24, 2025

Registered at 1710 KELLER PKWY # 4759, KELLER, TX 762483749 (Tel: 2102012364)

📍
Updated Business Mailing Address November 24, 2025

Registered at 1710 KELLER PKWY # 4759, KELLER, TX 762483749 (Tel: 2102012364)

📍
Updated Practice Location June 27, 2022

Registered at 508 DEEP EDDY AVE, AUSTIN, TX 78703 (Tel: 2102012364)

📍
Updated Business Mailing Address June 27, 2022

Registered at 539 W COMMERCE ST STE 4160, DALLAS, TX 752081953 (Tel: 2102012364)

👤
Provider Name / Credentials Updated May 24, 2022

Recorded as HARRIET SINGELYN, PSYD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) May 24, 2022

Psychologist (License #39356 in TX)

NPI Profile Active September 25, 2017

NPI status registered as active in NPPES database

📍
Updated Practice Location September 25, 2017

Registered at 2307 W. 6TH STREET, LOS ANGELES, CA 90057 (Tel: 2133512835)

📍
Updated Business Mailing Address September 25, 2017

Registered at 2307 W 6TH ST, LOS ANGELES, CA 900573119

👤
Provider Name / Credentials Updated September 25, 2017

Recorded as HARRIET STARES

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) September 25, 2017

Marriage & Family Therapist

🟢
Initial NPI Registration & Enumeration September 25, 2017

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: 1639688476
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: September 25, 2017
Last Update: November 24, 2025
Sole Proprietor: No

Mailing Address

1710 Keller Pkwy # 4759

Keller, TX 762483749

Phone: 2102012364

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.