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

CRYSTAL JOY SIERRA COTA/L
NPI 1093358921
Occupational Therapy Assistant in San Diego, CA

Active since October 23, 2019
4100 NORMAL ST, SAN DIEGO, CA 92103(619) 725-5501 Get Directions Write a Review

NPPES record last updated: July 30, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 30, 2026, Oct 23, 2019 (2 updates tracked since 2019).

About Crystal Joy Sierra Cota/l NPPES

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

CRYSTAL JOY SIERRA COTA/L (NPI 1093358921) is an individual occupational therapy assistant in San Diego, California, licensed in California (5012) and active in the NPI registry since October 2019.

NPPES Registry Identity

NPI1093358921
Entity TypeIndividualFemale
Primary Taxonomy224Z00000X
Provider Legal NameCRYSTAL JOY SIERRACredential: COTA/L
Location Address4100 NORMAL STSan Diego, CA 92103-2653
Mailing Address5762 Olvera AveSan Diego, CA 92114-5430 · (619) 917-5929
Sole ProprietorNo
Enumeration DateOctober 23, 2019
Last NPPES UpdateJuly 30, 20262 updates tracked since enumeration
NPPES CertifiedJuly 30, 2026
NPI 1093358921 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyOccupational Therapy AssistantRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Code224Z00000X
License Licensed in CA · 5012
Definition
An occupational therapy assistant is a person who has graduated from an occupational therapy assistant program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, has successfully completed a period of supervised fieldwork experience required by the accredited occupational therapy assistant program, has passed a nationally recognized entry-level examination for occupational therapy assistants, and fulfills state requirements for licensure, certification, or registration. An occupational therapy assistant provides interventions under the supervision of an occupational therapist which emphasize the therapeutic use of everyday life activities (i.e., occupations) with individuals or groups for the purpose of facilitating participation in roles and situations and in home, school, workplace, community and other settings. Occupational therapy services are provided for the purpose of promoting health and wellness and are provided to those who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. Occupational therapy assistants address the physical, cognitive, psychosocial, sensory, and other aspects of occupational performance in a variety of contexts to support engagement in everyday life activities that affect health, well-being, and quality of life.
4100 NORMAL ST, San Diego, CA 92103

Other Names 1

Former Name (1)Crystal Joy Sierra

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.

Occupational Therapist
4100 NORMAL ST
SAN DIEGO, CA 92103
Speech-Language Pathologist
4100 NORMAL ST
SAN DIEGO, CA 92103
Occupational Therapist
4100 NORMAL ST
SAN DIEGO, CA 92103
Occupational Therapist
4100 NORMAL ST
SAN DIEGO, CA 92103
Speech-Language Pathologist
4100 NORMAL ST
SAN DIEGO, CA 92103
Speech-Language Pathologist
4100 NORMAL ST
SAN DIEGO, CA 92103
Speech-Language Pathologist
4100 NORMAL ST
SAN DIEGO, CA 92103
Occupational Therapist
4100 NORMAL ST
SAN DIEGO, CA 92103

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 Crystal Sierra's NPI number?

The NPI number for Crystal Sierra is 1093358921. It was assigned to this individual provider in the NPPES registry on October 23, 2019. The provider is also known as Crystal Joy Sierra.

Where is Crystal Sierra located?

Crystal Sierra practices at 4100 Normal St, San Diego, CA 92103. The listed phone number is (619) 725-5501.

What is Crystal Sierra's specialty?

The primary specialty registered for this NPI is Occupational Therapy Assistant with taxonomy code 224Z00000X.

When was this NPI record last updated?

The NPPES record for Crystal Sierra was last updated on July 30, 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.