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

CHIA-YING CHOU PHD
NPI 1174045199
Psychologist in San Francisco, CA

Active since July 11, 2017Opted out of Medicare · through Jul 26, 2027
465 CALIFORNIA ST STE 660, SAN FRANCISCO, CA 94104(415) 234-0310 Get Directions Write a Review

NPPES record last updated: July 29, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 29, 2026, Jul 11, 2017 (2 updates tracked since 2017).

About Chia-ying Chou Phd NPPES

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

CHIA-YING CHOU PHD (NPI 1174045199) is an individual psychologist in San Francisco, California and active in the NPI registry since July 2017. She has opted out of Medicare through July 26, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1174045199
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameCHIA-YING CHOUCredential: PHD
Location Address465 CALIFORNIA ST STE 660San Francisco, CA 94104-1845
Mailing Address465 California St Ste 660San Francisco, CA 94104-1845 · (415) 234-0310
Sole ProprietorYes
Enumeration DateJuly 11, 2017
Last NPPES UpdateJuly 29, 20262 updates tracked since enumeration
NPPES CertifiedJuly 29, 2026
NPI 1174045199 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
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.
465 CALIFORNIA ST STE 660, San Francisco, CA 94104

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Opted out of Medicare

Chia-ying Chou 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 July 26, 2021 through July 26, 2027.

Opt-Out Effective DateJuly 26, 2021
Opt-Out In Effect ThroughJuly 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 3

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

Psychologist
465 CALIFORNIA ST STE 660
SAN FRANCISCO, CA 94104
Marriage & Family Therapist
465 CALIFORNIA ST STE 660
SAN FRANCISCO, CA 94104
Counselor
465 CALIFORNIA ST STE 660
SAN FRANCISCO, CA 94104

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 Chia-ying Chou's NPI number?

The NPI number for Chia-ying Chou is 1174045199. It was assigned to this individual provider in the NPPES registry on July 11, 2017.

Where is Chia-ying Chou located?

Chia-ying Chou practices at 465 California St Ste 660, San Francisco, CA 94104. The listed phone number is (415) 234-0310.

What is Chia-ying Chou's specialty?

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

Is Chia-ying Chou enrolled in Medicare?

No. Chia-ying Chou has opted out of Medicare through July 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.

When was this NPI record last updated?

The NPPES record for Chia-ying Chou was last updated on July 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.