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CASSONDRA R ROOK LCSW
NPI 1710650056
Social Worker in Rocklin, CA

Active since July 30, 2021
5701 LONETREE BLVD STE 221F, ROCKLIN, CA 95765(916) 742-3761 Get Directions Write a Review

NPPES record last updated: March 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 27, 2026, Jul 30, 2021 (2 updates tracked since 2021).

About Cassondra R Rook Lcsw NPPES

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

CASSONDRA R ROOK LCSW (NPI 1710650056) is an individual social worker in Rocklin, California, licensed in California (137587) and active in the NPI registry since July 2021. She maintains 2 additional practice locations.

NPPES Registry Identity

NPI1710650056
Entity TypeIndividualFemale
Primary Taxonomy104100000X
Provider Legal NameCASSONDRA R ROOKCredential: LCSW
Location Address5701 LONETREE BLVD STE 221FRocklin, CA 95765-3796
Mailing Address5321 Delta DrRocklin, CA 95765-5178 · (916) 742-3761
Phone(916) 742-3761
Sole ProprietorYes
Enumeration DateJuly 30, 2021
Last NPPES UpdateMarch 27, 20262 updates tracked since enumeration
NPPES CertifiedMarch 27, 2026
✔ NPI 1710650056 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in CA · 137587
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
5701 LONETREE BLVD STE 221F, Rocklin, CA 95765
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Other Names 1

Former Name (1)Cassondra R Siebecke

Secondary Practice Locations 2

Location 12750 Sutterville RdSacramento, CA 95820-1093 · Phone (916) 290-8130
Location 21895 E Roseville Pkwy Ste 120Roseville, CA 95661-7977 · Phone (916) 742-3761

Other Providers at the Same Location NPPES 2

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

DIANNE ANCONA LPCC 12456
Counselor (Professional)
5701 LONETREE BLVD STE 221F
ROCKLIN, CA 95765
Placer County (916) 316-6565
THRIVING LIFE COUNSELING
Counselor (Mental Health)
5701 LONETREE BLVD STE 221F
ROCKLIN, CA 95765
Placer County (630) 977-9761

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 Cassondra Rook's NPI number?

The NPI number for Cassondra Rook is 1710650056. It was assigned to this individual provider in the NPPES registry on July 30, 2021. The provider is also known as Cassondra R Siebecke.

Where is Cassondra Rook located?

Cassondra Rook practices at 5701 Lonetree Blvd Ste 221F, Rocklin, CA 95765. The listed phone number is (916) 742-3761.

What is Cassondra Rook's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for Cassondra Rook was last updated on March 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.