Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. TRUDY NARIKIYO GUO PHD
NPI 1750481966
Psychologist in Honolulu, HI

Active since September 25, 2006Opted out of Medicare · through Feb 26, 2027
643 ILALO STREET, HONOLULU, HI 96813(808) 591-2533(808) 599-2544 Get Directions Write a Review

NPPES record last updated: August 7, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 7, 2026, Mar 4, 2022 (2 updates tracked since 2022).

About Dr. Trudy Narikiyo Guo Phd NPPES

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

DR. TRUDY NARIKIYO GUO PHD (NPI 1750481966) is an individual psychologist in Honolulu, Hawaii, licensed in Hawaii (PSY469) and active in the NPI registry since September 2006. She has opted out of Medicare through February 26, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1750481966
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. TRUDY NARIKIYO GUOCredential: PHD
Location Address643 ILALO STREETHonolulu, HI 96813
Mailing Address2101 Nuuanu Ave Apt 1801Honolulu, HI 96817-1768 · (808) 591-2533 · Fax (808) 599-2544
Fax(808) 599-2544
Sole ProprietorNo
Enumeration DateSeptember 25, 2006
Last NPPES UpdateAugust 7, 20262 updates tracked since enumeration
NPPES CertifiedAugust 7, 2026
NPI 1750481966 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 HI · PSY469
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.
643 ILALO STREET, Honolulu, HI 96813

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Opted out of Medicare

Dr. Trudy Narikiyo Guo Phd has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from February 26, 2013 through February 26, 2027.

Opt-Out Effective DateFebruary 26, 2013
Opt-Out In Effect ThroughFebruary 26, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES

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

Psychologist
643 ILALO STREET
HONOLULU, HI 96813

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 Trudy Guo's NPI number?

The NPI number for Trudy Guo is 1750481966. It was assigned to this individual provider in the NPPES registry on September 25, 2006.

Where is Trudy Guo located?

Trudy Guo practices at 643 Ilalo Street, Honolulu, HI 96813. The listed phone number is (808) 591-2533.

What is Trudy Guo's specialty?

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

Is Trudy Guo enrolled in Medicare?

No. Trudy Guo has opted out of Medicare through February 26, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

What insurance does Trudy Guo accept?

Health plans from HMSA and Providence Health Plan list Trudy Guo 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 Trudy Guo was last updated on August 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 days 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.