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

KATELYN DE SANTIS
NPI 1639055510
Psychologist in El Monte, CA

Active since August 14, 2025
3569 LEXINGTON AVE, EL MONTE, CA 91731(626) 646-9050 Get Directions Write a Review

NPPES record last updated: October 8, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 8, 2026, Aug 14, 2025 (2 updates tracked since 2025).

About Katelyn De Santis NPPES

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

KATELYN DE SANTIS (NPI 1639055510) is an individual psychologist in El Monte, California and active in the NPI registry since August 2025.

NPPES Registry Identity

NPI1639055510
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameKATELYN DE SANTIS
Location Address3569 LEXINGTON AVEEl Monte, CA 91731-2607
Mailing Address95 N Marengo Ave Ste 100Pasadena, CA 91101-4550
Sole ProprietorNo
Enumeration DateAugust 14, 2025
Last NPPES UpdateOctober 8, 20262 updates tracked since enumeration
NPPES CertifiedOctober 8, 2026
✔ NPI 1639055510 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.
3569 LEXINGTON AVE, El Monte, CA 91731

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.

Student in an Organized Health Care Education/Training Program
3569 LEXINGTON AVE
EL MONTE, CA 91731
Student in an Organized Health Care Education/Training Program
3569 LEXINGTON AVE
EL MONTE, CA 91731
Student in an Organized Health Care Education/Training Program
3569 LEXINGTON AVE
EL MONTE, CA 91731
Counselor (Mental Health)
3569 LEXINGTON AVE
EL MONTE, CA 91731
Licensed Psychiatric Technician
3569 LEXINGTON AVE
EL MONTE, CA 91731
Social Worker
3569 LEXINGTON AVE
EL MONTE, CA 91731
Marriage & Family Therapist
3569 LEXINGTON AVE
EL MONTE, CA 91731
Student in an Organized Health Care Education/Training Program
3569 LEXINGTON AVE
EL MONTE, CA 91731

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 Katelyn De Santis's NPI number?

The NPI number for Katelyn De Santis is 1639055510. It was assigned to this individual provider in the NPPES registry on August 14, 2025.

Where is Katelyn De Santis located?

Katelyn De Santis practices at 3569 Lexington Ave, El Monte, CA 91731. The listed phone number is (626) 646-9050.

What is Katelyn De Santis's specialty?

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

When was this NPI record last updated?

The NPPES record for Katelyn De Santis was last updated on October 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.