Cathie Gantner Overmyer, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

16939A Issued in WY

Practice address

555 E Broadway Ave Ste 201
Jackson, WY 83001-8640

Phone

(307) 733-7222

Fax

(307) 739-4828

NPI assigned

May 23, 2006

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other names 1

• Cathie Gantner-Overmyer Former name

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in IL, WY2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Internal Medicine

Education

University of Wisconsin School of Medicine, 1985

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Teton County Hospital DistrictGroup PAC ID 4880582295, 107 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• St John'S Home Care Home health agency, Jackson, WY, CCN 537063
• St Johns Medical Center Hospital, Jackson, WY, CCN 530015
• Star Valley Medical Center Hospital, Afton, WY, CCN 531313

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: cgantnerovermyer58218@direct.rush.rush-health.com

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

• Teton County Hospital District

  • General Practice Physician
  • Jackson, WY
  • NPI 1487818605
  Medicare reassignment Care Compare group NPD
• Rush Oak Park ER Physicians Group

  • Emergency Medical Services (Emergency Medicine) Physician
  • Oak Park, IL
  • NPI 1447260880
  Medicare reassignment NPD
• Rush Oak Park Physicians Group Adult Medicine

  • Adult Medicine Physician
  • Oak Park, IL
  • NPI 1548531924

  Internal Medicine

  Medicare reassignment NPD
• Rush Oak Park Physicians Group Center for Diabetes and Endocrine

  • Endocrinology, Diabetes & Metabolism Physician
  • Oak Park, IL
  • NPI 1841560141
  Medicare reassignment NPD
• Rush University Medical Group

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1093819542
  Medicare reassignment NPD
• Rush University Medical Center

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1689165540
  NPD
• Frederick Health Hospital Inc

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• North Lincoln County Hospital District

  • Critical Access Hospital
  • Afton, WY
  • NPI 1255376406
  Care Compare affiliation
• Teton County Hospital District

  • Home Health Agency
  • Jackson, WY
  • NPI 1194744235
  Care Compare affiliation
• Teton County Hospital District

  • General Acute Care Hospital
  • Jackson, WY
  • NPI 1801835475
  Care Compare affiliation

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

{
    "created_epoch": "1148342400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1737417600000",
    "number": "1760437263",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 428",
            "city": "JACKSON",
            "state": "WY",
            "postal_code": "830010428",
            "telephone_number": "307-733-3636",
            "fax_number": "877-205-2024"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "555 E BROADWAY AVE STE 201",
            "city": "JACKSON",
            "state": "WY",
            "postal_code": "830018640",
            "telephone_number": "307-733-7222",
            "fax_number": "307-739-4828"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "625 E Broadway Ave",
            "address_purpose": "LOCATION",
            "city": "Jackson",
            "state": "WY",
            "postal_code": "830018642",
            "country_code": "US",
            "telephone_number": "307-733-3636",
            "fax_number": "877-205-2024",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "OVERMYER",
        "first_name": "CATHIE",
        "middle_name": "GANTNER",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-05-23",
        "last_updated": "2025-01-21",
        "certification_date": "2025-01-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WY",
            "license": "16939A",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036083495",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "covermyer@sjmc.cernerdirect.com",
            "affiliation": "N",
            "endpointDescription": "message",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "555 E Broadway Ave Ste 201",
            "city": "Jackson",
            "state": "WY",
            "country_code": "US",
            "postal_code": "830018640",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "first_name": "CATHIE",
            "last_name": "GANTNER-OVERMYER",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

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• Internal Medicine Physician in Jackson, WY
• Providers in Jackson, WY by specialty
• Internal Medicine Physician in Wyoming

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 21, 2025; 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.