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MS. KATELYN ELIZABETH SINN LCSW
NPI 1316464449
Social Worker - Clinical in Rancho Cucamonga, CA

Active since August 29, 2017
PO BOX 1202, RANCHO CUCAMONGA, CA 91729(909) 609-5817 Get Directions Write a Review

NPPES record last updated: June 19, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 2, 2026, Jul 21, 2022, Aug 29, 2017 (3 updates tracked since 2017).

About Ms. Katelyn Elizabeth Sinn Lcsw NPPES

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

MS. KATELYN ELIZABETH SINN LCSW (NPI 1316464449) is an individual clinical provider in Rancho Cucamonga, California, licensed in California (109685) and active in the NPI registry since August 2017.

NPPES Registry Identity

NPI1316464449
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. KATELYN ELIZABETH SINNCredential: LCSW
Location AddressPO BOX 1202Rancho Cucamonga, CA 91729-1202
Mailing AddressPo Box 1202Rancho Cucamonga, CA 91729-1202 · (909) 609-5817
Phone(909) 609-5817
Sole ProprietorYes
Enumeration DateAugust 29, 2017
Last NPPES UpdateJune 19, 20263 updates tracked since enumeration
NPPES CertifiedJune 19, 2026
✔ NPI 1316464449 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CA · 109685
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
PO BOX 1202, Rancho Cucamonga, CA 91729
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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 Sinn's NPI number?

The NPI number for Katelyn Sinn is 1316464449. It was assigned to this individual provider in the NPPES registry on August 29, 2017.

Where is Katelyn Sinn located?

Katelyn Sinn practices at PO Box 1202, Rancho Cucamonga, CA 91729. The listed phone number is (909) 609-5817.

What is Katelyn Sinn's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Katelyn Sinn was last updated on June 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 47 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.