DR. MARY JOSEPHINE HENDRICKSON PHD
NPI 1699755561
Psychologist in Issaquah, WA

Active since January 18, 2006PECOS EnrolledAccepts Medicare Assignment
22500 SE 64TH PL STE 230, ISSAQUAH, WA 98027(425) 409-6414(425) 409-6618 Get Directions Write a Review

NPPES record last updated: October 3, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Mary Josephine Hendrickson Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARY JOSEPHINE HENDRICKSON PHD (NPI 1699755561) is an individual psychologist in Issaquah, Washington, licensed in Washington (PY00002719) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1997).

NPPES Registry Identity

NPI1699755561
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. MARY JOSEPHINE HENDRICKSONCredential: PHD
Location Address22500 SE 64TH PL STE 230Issaquah, WA 98027-8111
Mailing Address22500 Se 64th Pl Ste 230Issaquah, WA 98027-8111 · (425) 409-6414 · Fax (425) 409-6618
Fax(425) 409-6618
Sole ProprietorNo
Medical School CMSOtherGraduated 1997
Enumeration DateJanuary 18, 2006
Last NPPES UpdateOctober 3, 2025
NPPES CertifiedOctober 3, 2025
✔ NPI 1699755561 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in WA · PY00002719
Definition
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.
22500 SE 64TH PL STE 230, Issaquah, WA 98027

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mary Josephine Hendrickson Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6507225042
PECOS Enrollment IDI20230630002809
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mary Hendrickson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Clinical
7507 NE 51ST ST
Vancouver, WA 98662
  • Reassigned Medicare billing, Washington enrollment
  • 225 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Psychologist (Clinical)
22500 SE 64TH PL STE 230
ISSAQUAH, WA 98027
Marriage & Family Therapist
22500 SE 64TH PL STE 230
ISSAQUAH, WA 98027
Counselor (Mental Health)
22500 SE 64TH PL STE 230
ISSAQUAH, WA 98027
Counselor (Mental Health)
22500 SE 64TH PL STE 230
ISSAQUAH, WA 98027
Social Worker (Clinical)
22500 SE 64TH PL STE 230
ISSAQUAH, WA 98027

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mary Hendrickson's NPI number?

The NPI number for Mary Hendrickson is 1699755561. It was assigned to this individual provider in the NPPES registry on January 18, 2006.

Where is Mary Hendrickson located?

Mary Hendrickson practices at 22500 SE 64th Pl Ste 230, Issaquah, WA 98027. The listed phone number is (425) 409-6414.

What is Mary Hendrickson's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Mary Hendrickson enrolled in Medicare?

Yes. Mary Hendrickson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Mary Hendrickson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Hendrickson reassigns Medicare benefits to Western Psychological And Counseling Services LLC (Vancouver, WA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mary Hendrickson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Hendrickson accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Mary Hendrickson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mary Hendrickson was last updated on October 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.