Cassondra R Rook, LCSW

Primary specialty

Social WorkerTaxonomy code 104100000X

License

137587 Issued in CA

Practice address

5701 Lonetree Blvd Ste 221F
Rocklin, CA 95765-3796

Phone

(916) 742-3761

NPI assigned

Jul 30, 2021

Sex

Female

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other names 1

• Cassondra R Siebecke Former name

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1627603200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774569600000",
    "number": "1710650056",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5321 DELTA DR",
            "city": "ROCKLIN",
            "state": "CA",
            "postal_code": "957655178",
            "telephone_number": "916-742-3761"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5701 LONETREE BLVD STE 221F",
            "city": "ROCKLIN",
            "state": "CA",
            "postal_code": "957653796",
            "telephone_number": "916-742-3761"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2750 Sutterville Rd",
            "address_purpose": "LOCATION",
            "city": "Sacramento",
            "state": "CA",
            "postal_code": "958201093",
            "country_code": "US",
            "telephone_number": "916-290-8130",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1895 E Roseville Pkwy Ste 120",
            "address_purpose": "LOCATION",
            "city": "Roseville",
            "state": "CA",
            "postal_code": "956617977",
            "country_code": "US",
            "telephone_number": "916-742-3761",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ROOK",
        "first_name": "CASSONDRA",
        "middle_name": "R",
        "credential": "LCSW",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2021-07-30",
        "last_updated": "2026-03-27",
        "certification_date": "2026-03-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "104100000X",
            "taxonomy_group": "",
            "desc": "Social Worker",
            "state": "CA",
            "license": "137587",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "CASSONDRA",
            "last_name": "SIEBECKE",
            "middle_name": "R",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Bruce James Roe, PAC
• Emily Katherine Romaniolis, NONE
• Isabella Romero
• Kim Romero
• Melissa Mariah Bencomo Romero
• Carly Rosada, OTR/L
• Lawrence Rosaluna, RN
• Chloe F Rosen-Paulsen
• Roseville Birthing Center (California Birth Center)
• Roseville Birthing Center (California Birth Center)

• Social Worker in Rocklin, CA
• Providers in Rocklin, CA by specialty
• Social Worker in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 27, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.