Individual provider Active NPI

Clayton Lanham, MD

  • Family Medicine Physician
  • Lake Geneva, WI
National Provider Identifier
1831848951
Registry record updated Sep 12, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
9901 Issued in WI
Practice address
146 E Geneva SQ
Lake Geneva, WI 53147-9695
Phone
(262) 249-4660
NPI assigned
Mar 23, 2022
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Sep 12, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X 9901 WI Primary

Addresses

Primary practice location

146 E Geneva SQ
Lake Geneva, WI 53147-9695

Mailing address

PO Box 735044
Chicago, IL 60673-5044
Phone (800) 326-2250

Other practice location 1

W3985 County Road Nn
Elkhorn, WI 53121-4337
Phone (262) 741-2121

Other identifiers 1

IdentifierTypeStateIssuer
100275199MedicaidWI

Electronic endpoints 2

TypeEndpointUseAffiliation
FHIR URL https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/
Direct Messaging Address clanham339400@direct.myadvocateaurora.org Direct

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI
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 1

Enrollment IDStateProvider typePAC IDDetails
I20250819001929 WI Practitioner - Family Practice 0042652745 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Family Practice
Education
Other, 2021
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Aurora Medical Group, Inc.Group PAC ID 6709794258, 3,764 clinicians

Practice addresses (Care Compare)

146 E Geneva SQ
Lake Geneva, WI 53147-9694
Phone (262) 249-5000

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Aurora Medical Group, Inc. CurrentSince Aug 21, 2025 Accepting new patients
Lakeshore Medical Clinic LTD Family Medicine CurrentSince Aug 21, 2025 Accepting new patients
Aurora Advanced Healthcare, Inc. Family Medicine CurrentSince Aug 21, 2025 Accepting new patients
Lakeshore Medical Clinic, LLC Family Medicine CurrentSince Aug 21, 2025 Accepting new patients
Aurora Medical Group, Inc. CurrentSince Aug 21, 2025 Accepting new patients
Aurora Medical Group, Inc. Family Medicine Current Accepting new patients
Aurora Advanced Healthcare Inc CurrentSince Aug 21, 2025 Accepting new patients

Locations

W3985 Highway NN
Elkhorn, WI 53121
Phone (262) 741-2000

3003 W Good Hope Rd
Glendale, WI 53209
Phone (414) 352-3100

146 E Geneva Sq
Lake Geneva, WI 53147
Phone (262) 249-4678

12203 N Corporate Pkwy
Mequon, WI 53092
Phone (262) 387-8200

1020 N 12th St
Milwaukee, WI 53233
Phone (414) 219-3056

S74W16775 Janesville Rd
Muskego, WI 53150
Phone (414) 422-4747

2000 E Layton Ave
St Francis, WI 53235
Phone (414) 744-7880

Organizations & group practices 7

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.

NPI Registry JSON

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

{
    "created_epoch": "1647993600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757635200000",
    "number": "1831848951",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 735044",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606735044",
            "telephone_number": "800-326-2250"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "146 E GENEVA SQ",
            "city": "LAKE GENEVA",
            "state": "WI",
            "postal_code": "531479695",
            "telephone_number": "262-249-4660"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "W3985 County Road Nn",
            "address_purpose": "LOCATION",
            "city": "Elkhorn",
            "state": "WI",
            "postal_code": "531214337",
            "country_code": "US",
            "telephone_number": "262-741-2121",
            "fax_number": "262-741-2178",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LANHAM",
        "first_name": "CLAYTON",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-03-23",
        "last_updated": "2025-09-12",
        "certification_date": "2025-09-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "WI",
            "license": "9901",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "100275199",
            "state": "WI"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "146 E Geneva Sq",
            "city": "Lake Geneva",
            "state": "WI",
            "country_code": "US",
            "postal_code": "531479695",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "clanham339400@direct.myadvocateaurora.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "146 E Geneva Sq",
            "city": "Lake Geneva",
            "state": "WI",
            "country_code": "US",
            "postal_code": "531479695",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Lake Geneva, WI

Sources for this page

Verify at the official NPI Registry.