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

KATHERINE DAY
NPI 1609559947
Marriage & Family Therapist in San Jose, CA

Active since August 11, 2023
1922 THE ALAMEDA, SAN JOSE, CA 95126(408) 261-7777(408) 642-6052 Get Directions Write a Review

NPPES record last updated: September 1, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Sep 1, 2026, May 30, 2025, Aug 11, 2023 (3 updates tracked since 2023).

About Katherine Day NPPES

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

KATHERINE DAY (NPI 1609559947) is an individual marriage & family therapist in San Jose, California, licensed in California (165014) and active in the NPI registry since August 2023.

NPPES Registry Identity

NPI1609559947
Entity TypeIndividualFemale
Primary Taxonomy106H00000X
Provider Legal NameKATHERINE DAY
Location Address1922 THE ALAMEDASan Jose, CA 95126-1457
Mailing Address1922 The Alameda Ste 316San Jose, CA 95126-1461 · (408) 261-7777 · Fax (408) 642-6052
Phone(408) 261-7777
Fax(408) 642-6052
Sole ProprietorYes
Enumeration DateAugust 11, 2023
Last NPPES UpdateSeptember 1, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 1, 2026
✔ NPI 1609559947 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers
Taxonomy Code106H00000X
License✔ Licensed in CA · 165014
Definition
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.
Also ListedCounselor · ProfessionalTaxonomy 101YP2500X · License 23665 (CA)
1922 THE ALAMEDA, San Jose, CA 95126
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Other Providers at the Same Location NPPES 20

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

MS. CHARLENE DILLARD WATKINS
Rehabilitation Practitioner
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (408) 261-7777
JULIA PHILLIPS
Rehabilitation Practitioner
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (408) 261-7777
PRISCILLA MARQUEZ
Rehabilitation Practitioner
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (408) 261-7777
MOMENTUM FOR HEALTH
Community/Behavioral Health
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (408) 261-7777
DANIELLE ELIZABETH CABALLERO
Case Manager/Care Coordinator
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (408) 261-7777
DENISSE GARCIA GARCIA
Social Worker (Clinical)
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (408) 639-4391
ALEXANDER KWAN
Behavior Technician
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (510) 679-3545
RAMONA AMELY
Counselor (Mental Health)
1922 THE ALAMEDA
SAN JOSE, CA 95126
Santa Clara County (408) 261-7777

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 Katherine Day's NPI number?

The NPI number for Katherine Day is 1609559947. It was assigned to this individual provider in the NPPES registry on August 11, 2023.

Where is Katherine Day located?

Katherine Day practices at 1922 The Alameda, San Jose, CA 95126. The listed phone number is (408) 261-7777.

What is Katherine Day's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

When was this NPI record last updated?

The NPPES record for Katherine Day was last updated on September 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 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.