Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1699755561 Individual Practitioner Female Practitioner

Dr. Mary Josephine Hendrickson , PhD

Psychologist • Issaquah, WA

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Mary Hendrickson, PhD is a certified Psychologist practicing in Issaquah, WA. With approximately 29 years of clinical experience since completing medical education in 1997, Dr. Hendrickson delivers high-quality medical care to the local community at 22500 SE 64TH PL STE 230.

Dr. Hendrickson is affiliated with Western Psychological And Counseling Services Llc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Practice Location & Contact Primary Location

Practice Address

22500 Se 64th Pl Ste 230

Issaquah, WA 980278111

Telephone 4254096414
Fax 4254096618

Medicare Profile & Education

Medical School

Other

Graduation Year

1997

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Psychologist in Issaquah, WA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
29 Yrs +9.0 yrs vs City Avg
City Avg: 20.0 Yrs
State Avg: 21.7 Yrs
Regional Practice Density
12 Specialists

Practicing in Issaquah, WA (1137 Statewide)

Telehealth Adoption Rate
8.3% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Hendrickson (29 Years) 29 Yrs
Issaquah Specialty Average (20.0 Years) 20.0 Yrs

Medical Specialties & State Licenses

CMS Verified: 2025-10-03
Psychologist Primary Specialty

NUCC Taxonomy Code: 103T00000X

State License WA PY00002719

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

Western Psychological And Counseling Services Llc

22500 Se 64th Pl, Issaquah, WA 980278111

Phone: 4254096414

Practice Associates & Co-Workers

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

9 Associated Practitioners
Amy Bliven-Lee , LMHC-A

Counselor - Mental Health

NPI 1023782265

LMHCA

Anthony Ensey

Social Worker - Clinical

NPI 1083124127
Jaclyn Lane , LMHCA, SUDP

Counselor - Mental Health

NPI 1184054520
Nina Erichsen , LMFTA

Marriage & Family Therapist

NPI 1417569237
Aleksandra Dziczkaniec

Counselor - Mental Health

NPI 1457150104
Jennifer De Alba , MA, LMHC

Counselor - Mental Health

NPI 1588147367

Master of Arts, Licensed Mental Health Counselor

Career & Practice History Timeline

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

10 Historical Events
📍
Updated Practice Location October 03, 2025

Registered at 22500 SE 64TH PL STE 230, ISSAQUAH, WA 980278111 (Tel: 4254096414)

📍
Updated Business Mailing Address October 03, 2025

Registered at 22500 SE 64TH PL STE 230, ISSAQUAH, WA 980278111 (Tel: 4254096414)

👤
Provider Name / Credentials Updated October 03, 2025

Recorded as MARY HENDRICKSON, PHD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) October 03, 2025

Psychologist (License #PY00002719 in WA)

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 5825 221ST PLACE SE, STE 201, ISSAQUAH, WA 98027 (Tel: 2064315336)

📍
Updated Business Mailing Address July 08, 2007

Registered at 16040 CHRISTENSEN RD, STE 212, TUKWILA, WA 98188 (Tel: 2064315336)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as MARY HENDRICKSON, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Psychologist (License #PY2719 in WA)

🟢
Initial NPI Registration & Enumeration January 18, 2006

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: 1699755561
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: January 18, 2006
Last Update: October 03, 2025
Sole Proprietor: No

Mailing Address

22500 Se 64th Pl Ste 230

Issaquah, WA 980278111

Phone: 4254096414

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.