Doreen Best Sielert, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

113022 Issued in CA

Practice address

2225 Challenger Way
Santa Rosa, CA 95407-5441

Phone

(707) 565-8181

NPI assigned

Jun 9, 2022

Last updated

Mar 1, 2026By the provider in NPPES

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

• Doreen Best Sielert Other name

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Sutter Bay Medical Foundation

  dba Palo Alto Medial Foundation

  • Multi-Specialty Clinic/Center
  • Palo Alto, CA
  • NPI 1013950807
  Medicare reassignment NPD
• County of Sonoma

  • Community Health Clinic/Center
  • Cloverdale, CA
  • NPI 1952637027
  Medicare reassignment
• Sutter Bay Medical Foundation

  dba Sutter Pacific Medical Foundation

  • Multi-Specialty Clinic/Center
  • Sacramento, CA
  • NPI 1003267196
  NPD
• Sutter Bay Medical Foundation

  dba Palo Alto Medical Foundation

  • Clinical Medical Laboratory
  • Santa Clara, CA
  • NPI 1669287033
  NPD

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

{
    "created_epoch": "1654732800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772323200000",
    "number": "1952030207",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 6927",
            "city": "SANTA ROSA",
            "state": "CA",
            "postal_code": "954060927",
            "telephone_number": "707-623-0129"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2225 CHALLENGER WAY",
            "city": "SANTA ROSA",
            "state": "CA",
            "postal_code": "954075441",
            "telephone_number": "707-565-8181"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "PO Box 6927",
            "address_purpose": "LOCATION",
            "city": "Santa Rosa",
            "state": "CA",
            "postal_code": "954060927",
            "country_code": "US",
            "telephone_number": "707-623-0129",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIELERT",
        "first_name": "DOREEN",
        "middle_name": "BEST",
        "credential": "LCSW",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2022-06-09",
        "last_updated": "2026-03-01",
        "certification_date": "2026-03-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CA",
            "license": "113022",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "DOREEN",
            "last_name": "SIELERT",
            "middle_name": "BEST",
            "credential": "LCSW",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Side by Side
• Navpreet Sidhu
• David Claude Sidney, MD
• Kaitlin Nawana Sieg
• Chelsea Siegel, BCBA, MA
• Sierra Orthopedic Laboratory, Inc.
• Blanca Estela Sierra Pineda, PMHNP-BC
• Iman Iqbal Sigman
• Signature Health Supplies
• Josphat W Sikwata, RN

• Clinical Social Worker in Santa Rosa, CA
• Providers in Santa Rosa, CA by specialty
• Clinical Social Worker in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 1, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.