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

DR. ROSWITHA M SAENZ-SIERZEGA PHD
NPI 1811219470
Psychologist in Chandler, AZ

Active since February 24, 2010
6909 W RAY RD UNIT 15-100, CHANDLER, AZ 85226(480) 409-2820 Get Directions Write a Review

NPPES record last updated: October 21, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Roswitha M Saenz-sierzega Phd NPPES

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

DR. ROSWITHA M SAENZ-SIERZEGA PHD (NPI 1811219470) is an individual psychologist in Chandler, Arizona, licensed in Arizona (4357) and active in the NPI registry since February 2010.

NPPES Registry Identity

NPI1811219470
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. ROSWITHA M SAENZ-SIERZEGACredential: PHD
Location Address6909 W RAY RD UNIT 15-100Chandler, AZ 85226-1699
Mailing Address6260 W Post RdChandler, AZ 85226-1164 · (915) 867-6228
Sole ProprietorYes
Enumeration DateFebruary 24, 2010
Last NPPES UpdateOctober 21, 2026
NPPES CertifiedOctober 21, 2026
✔ NPI 1811219470 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in AZ · 4357
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.
Also ListedCounselor · ProfessionalTaxonomy 101YP2500X · License 63779 (TX)
6909 W RAY RD UNIT 15-100, Chandler, AZ 85226

Other Names 1

Professional Name (2)Dr. Rosy Saenz-sierzega Ph.d.

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 Roswitha Saenz-sierzega's NPI number?

The NPI number for Roswitha Saenz-sierzega is 1811219470. It was assigned to this individual provider in the NPPES registry on February 24, 2010. The provider is also known as Dr. Rosy Saenz-Sierzega Ph.D..

Where is Roswitha Saenz-sierzega located?

Roswitha Saenz-sierzega practices at 6909 W Ray Rd Unit 15-100, Chandler, AZ 85226. The listed phone number is (480) 409-2820.

What is Roswitha Saenz-sierzega'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 Roswitha Saenz-sierzega was last updated on October 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.