NPIMap

Individual provider Active NPI

Joan M McMahon, MD

  • Internal Medicine Physician
  • Lewistown, MT
National Provider Identifier
1467403345
Registry record updated Jun 19, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
MED-PHYS-LIC-9666 Issued in MT
Practice address
408 Wendell Ave
Lewistown, MT 59457-2261
Phone
(406) 535-1502
NPI assigned
May 15, 2006
Last updated
Jun 19, 2024By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 19, 2024

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X MED-PHYS-LIC-9666 MT Primary
Hospitalist Physician 208M00000X MED-PHYS-LIC-9666 MT

Addresses

Primary practice location

408 Wendell Ave
Lewistown, MT 59457-2261

Mailing address

310 Wendell Ave
Att: Clinic Manager
Lewistown, MT 59457-2267
Phone (406) 535-1502

Other identifiers 2

IdentifierTypeStateIssuer
810536408OtherMTTAX ID #
0029206MedicaidMT

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MT
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20041112000618 MT Practitioner - Internal MedicinePractitioner - Pediatric MedicinePractitioner - Emergency Medicine 9537123229 Reassigns benefits to 7 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal MedicineAlso: Emergency Medicine, Pediatric Medicine
Education
Saint Louis University School of Medicine, 1996
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

408 Wendell Ave
Lewistown, MT 59457-2261
Phone (406) 535-1502

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
MED-PHYS-LIC-9666MTMDHospitalist Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Wheatland Memorial Healthcare CurrentSince Mar 1, 2019 Accepting new patients
Townsend Health Systems Inc, Internal Medicine CurrentSince Jul 6, 2022 Accepting new patients
Wheatland Memorial Healthcare CurrentSince Mar 1, 2019 Accepting new patients
Billings Clinic Current Accepting new patients
State of Montana Current Accepting new patients
Billings Clinic Internal Medicine CurrentSince Nov 5, 2023 Accepting new patients
Townsend Health Systems, Inc. Current Accepting new patients
Central Montana Medical Facilities, Inc. Internal Medicine CurrentSince May 1, 2024 Accepting new patients
State of Montana CurrentSince Aug 1, 2011 Accepting new patients
Central Montana Community Health Center, Inc. CurrentSince Apr 12, 2010 Accepting new patients
Billings Clinic CurrentSince Nov 5, 2023 Accepting new patients
State of Montana CurrentSince Aug 1, 2011 Accepting new patients
Bighorn Valley Health Center Incorporated CurrentSince Apr 12, 2010 Accepting new patients
Fergus County Past Accepting new patients
Montana Allergy, PLLC Past Accepting new patients

Locations

2800 10th Ave N
Billings, MT 59101
Phone (406) 248-3290

111 N Sanders St
#30
Helena, MT 59601

406 1st Ave S
Lewistown, MT 59457
Phone (406) 535-6545

408 Wendell Ave
Lewistown, MT 59457
Phone (406) 535-1502

800 Casino Creek Dr
Lewistown, MT 59457
Phone (406) 389-2272

110 N Oak St
Townsend, MT 59644
Phone (406) 266-3186

Interoperability endpoints

  • Direct secure messaging: jmcmahon@wheatlandmemorial.cernerdirect.com

Organizations & group practices 15

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.

View all 15

Hospital & facility affiliations 3

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

NPI Registry JSON

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

{
    "created_epoch": "1147651200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1718755200000",
    "number": "1467403345",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "310 WENDELL AVE",
            "address_2": "ATT: CLINIC MANAGER",
            "city": "LEWISTOWN",
            "state": "MT",
            "postal_code": "594572267",
            "telephone_number": "406-535-1502",
            "fax_number": "406-535-6299"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "408 WENDELL AVE",
            "city": "LEWISTOWN",
            "state": "MT",
            "postal_code": "594572261",
            "telephone_number": "406-535-1502"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MCMAHON",
        "first_name": "JOAN",
        "middle_name": "M",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-05-15",
        "last_updated": "2024-06-19",
        "certification_date": "2024-06-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MT",
            "license": "MED-PHYS-LIC-9666",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "MT",
            "license": "MED-PHYS-LIC-9666",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TAX ID #",
            "identifier": "810536408",
            "state": "MT"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0029206",
            "state": "MT"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Lewistown, MT

Sources for this page

Verify at the official NPI Registry.