William Sisco, PSY.D.

Primary specialty

Clinical PsychologistTaxonomy code 103TC0700X

License

0810005386 Issued in VA

Practice address

830 Cottageview Dr Ste 103
Traverse City, MI 49684-2373

Phone

(231) 631-7517

NPI assigned

Oct 4, 2016

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

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.

• Ethan Siegel, Psy.D.

  • Clinical Psychologist
  • Falls Church, VA
  • NPI 1215488911
  NPD (past)

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

{
    "created_epoch": "1475539200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1457801276",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "830 COTTAGEVIEW DR STE 103",
            "city": "TRAVERSE CITY",
            "state": "MI",
            "postal_code": "496842373",
            "telephone_number": "231-631-7517"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "830 COTTAGEVIEW DR STE 103",
            "city": "TRAVERSE CITY",
            "state": "MI",
            "postal_code": "496842373",
            "telephone_number": "231-631-7517"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "6105D Arlington Blvd",
            "address_purpose": "LOCATION",
            "city": "Falls Church",
            "state": "VA",
            "postal_code": "220442950",
            "country_code": "US",
            "telephone_number": "703-819-6177",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3793 Sandia Pl",
            "address_purpose": "LOCATION",
            "city": "Traverse City",
            "state": "MI",
            "postal_code": "496844456",
            "country_code": "US",
            "telephone_number": "231-631-7517",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SISCO",
        "first_name": "WILLIAM",
        "name_prefix": "Dr.",
        "credential": "PSY.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2016-10-04",
        "last_updated": "2025-09-11",
        "certification_date": "2021-11-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "VA",
            "license": "0810005386",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Brett William Sinclair
• Deanna L Sinclair, MHS, OTRL, CLT, CAPS
• Stephen Thomas Singbiel
• Mia Singleton
• April Joy Sischo
• James D Sitek, D.O.
• Genell Sivek, LMSW
• Julie Six, FDN-P, CFNC
• Brooklyn Marie Skeba
• Skelly Chiropractic and Wellness PLLC

• Clinical Psychologist in Traverse City, MI
• Providers in Traverse City, MI by specialty
• Clinical Psychologist in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.