NPIMap

Individual provider Active NPI

Nathaniel Joseph Spezia-Lindner, MD

  • Gastroenterology Physician
  • Bozeman, MT
National Provider Identifier
1235691148
Registry record updated Aug 29, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
MED-PHYS-LIC-152342 Issued in MT
Practice address
3905 Wellness Way
Bozeman, MT 59718-2402
Phone
(406) 898-1550
Fax
(406) 898-1559
NPI assigned
Apr 1, 2019
Last updated
Aug 29, 2025By the provider in NPPES
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Aug 29, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X
Gastroenterology Physician 207RG0100X MED-PHYS-LIC-152342 MT Primary

Addresses

Primary practice location

3905 Wellness Way
Bozeman, MT 59718-2402

Mailing address

3905 Wellness Way
Department of Gastroenterology
Bozeman, MT 59718
Phone (406) 898-1550

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
I20250428001820 MT Practitioner - Gastroenterology 2961928502 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Other, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Billings ClinicGroup PAC ID 6002993516, 814 clinicians

Practice addresses (Care Compare)

801 N 29TH St
Billings, MT 59101-0905
Phone (406) 238-2500

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy45
Upper gastrointestinal (GI) endoscopy for acid reflux38

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
MED-PHYS-LIC-152342MTMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Billings Clinic Gastroenterology CurrentSince Apr 17, 2025 Accepting new patients
Billings Clinic Current Accepting new patients
Billings Clinic Gastroenterology CurrentSince Apr 17, 2025 Accepting new patients
Billings Clinic Past Accepting new patients

Locations

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

801 N 29th St
Billings, MT 59101
Phone (406) 238-2210

3905 Wellness Way
Bozeman, MT 59718
Phone (406) 898-1200

Organizations & group practices 4

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.

Hospital & facility affiliations 13

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

View all 13

NPI Registry JSON

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

{
    "created_epoch": "1554076800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756425600000",
    "number": "1235691148",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3905 WELLNESS WAY",
            "address_2": "DEPARTMENT OF GASTROENTEROLOGY",
            "city": "BOZEMAN",
            "state": "MT",
            "postal_code": "59718",
            "telephone_number": "406-898-1550",
            "fax_number": "406-898-1559"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3905 WELLNESS WAY",
            "city": "BOZEMAN",
            "state": "MT",
            "postal_code": "597182402",
            "telephone_number": "406-898-1550",
            "fax_number": "406-898-1559"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SPEZIA-LINDNER",
        "first_name": "NATHANIEL",
        "middle_name": "JOSEPH",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2019-04-01",
        "last_updated": "2025-08-29",
        "certification_date": "2025-08-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "MT",
            "license": "MED-PHYS-LIC-152342",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Bozeman, MT

Sources for this page

Verify at the official NPI Registry.