Michael L Hammer, PHD

Primary specialty

PsychologistTaxonomy code 103T00000X

License

1828 Issued in WI

Practice address

560 4TH St
Pathway Clinic SC
Prairie Du Sac, WI 53578

Phone

(608) 643-3663

Fax

(608) 643-5014

NPI assigned

Apr 27, 2006

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in WI

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

Specialty

Clinical Psychologist

Education

Other, 1991

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Pathway to Wellness Community Clinic SCGroup PAC ID 4981995479, 4 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

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.

• Pathway to Wellness Community Clinic SC

  • Clinical Social Worker
  • Prairie Du Sac, WI
  • NPI 1528413739

  Psychologist

  Medicare reassignment Care Compare group NPD
• Erc Wisconsin, LLC

  • Adult Mental Health Clinic/Center
  • Wauwatosa, WI
  • NPI 1730853870
  NPD (past)

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

{
    "created_epoch": "1146096000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1629035324",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "560 4TH ST",
            "address_2": "PATHWAY CLINIC SC",
            "city": "PRAIRIE DU SAC",
            "state": "WI",
            "postal_code": "53578",
            "telephone_number": "608-643-3663",
            "fax_number": "608-643-5014"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "560 4TH ST",
            "address_2": "PATHWAY CLINIC SC",
            "city": "PRAIRIE DU SAC",
            "state": "WI",
            "postal_code": "53578",
            "telephone_number": "608-643-3663",
            "fax_number": "608-643-5014"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAMMER",
        "first_name": "MICHAEL",
        "middle_name": "L",
        "credential": "PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-04-27",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "WI",
            "license": "1828",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "39107900",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Paul J Ganshert, D.D.S.
• Laura Genthe, LPC
• Alison Gorman, PSYD
• Melissa M Graf, L.AC.
• Nathan D Grunewald
• Katherine Haugen, DDS
• Matthew M Hebert, M.D.
• Diane L Heiser, LPN
• Isaac J Hoffmaster, RD
• Heidi Beth Hohensee, ATC

• Psychologist in Prairie Du Sac, WI
• Providers in Prairie Du Sac, WI by specialty
• Psychologist in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.