William P. McInnis Psy.D, P.C.

Primary specialty

Clinical PsychologistTaxonomy code 103TC0700X

License

L947184 Issued in MI

Legal business name

WILLIAM P. MCINNIS PSY.D, P.C.

Practice address

2845 44TH St SW Ste 120
Grandville, MI 49418-2678

Phone

(616) 320-1205

Fax

(616) 805-4839

NPI assigned

Jul 9, 2008

Organization subpart

No

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

Authorized official

Name

Dr. William P McInnis, PSY.D.NPI 1427168285

Title

Owner

Phone

(616) 320-1205

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MI

Enrollment records 1

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• William Paul McInnis, PSY D

  • Psychologist
  • Grand Rapids, MI
  • NPI 1427168285
  Medicare reassignment NPD Authorized official

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

{
    "created_epoch": "1215561600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1780358400000",
    "number": "1871756841",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2845 44TH ST SW STE 120",
            "city": "GRANDVILLE",
            "state": "MI",
            "postal_code": "494182678",
            "telephone_number": "616-320-1205",
            "fax_number": "616-805-4839"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2845 44TH ST SW STE 120",
            "city": "GRANDVILLE",
            "state": "MI",
            "postal_code": "494182678",
            "telephone_number": "616-320-1205",
            "fax_number": "616-805-4839"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "WILLIAM P. MCINNIS PSY.D, P.C.",
        "organizational_subpart": "NO",
        "enumeration_date": "2008-07-09",
        "last_updated": "2026-06-02",
        "certification_date": "2026-06-02",
        "status": "A",
        "authorized_official_last_name": "MCINNIS",
        "authorized_official_first_name": "WILLIAM",
        "authorized_official_middle_name": "P",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "616-320-1205",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "PSY.D."
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Psychologist, Clinical",
            "state": "MI",
            "license": "L947184",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mark John Wierenga, DDS, MS
• Michael John Wierenga, D.D.S.
• Wilcox Counseling Services
• Elizabeth Wilcox
• Sarah E Wilcox, LPC
• Jenna Williams
• Randall Williams, D.C.
• Rihanna Williams
• Sydne C Wilson, RBT
• Douglas A Winstanley, D.O.

• Clinical Psychologist in Grandville, MI
• Providers in Grandville, MI by specialty
• Clinical Psychologist in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.