NPIMap

Individual provider Active NPI

Brock Alonzo, M.D.

  • Glaucoma Specialist (Ophthalmology) Physician
  • Hamilton, MT
National Provider Identifier
1144649138
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Glaucoma Specialist (Ophthalmology) PhysicianTaxonomy code 207WX0009X
License
77900 Issued in MT
Practice address
300 N 10TH St Ste a
Hamilton, MT 59840-5322
Phone
(406) 363-5434
Fax
(406) 363-5210
NPI assigned
Apr 7, 2014
Last updated
Sep 11, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Glaucoma Specialist (Ophthalmology) Physician 207WX0009X 77900 MT Primary

Addresses

Primary practice location

300 N 10TH St Ste a
Hamilton, MT 59840-5322

Mailing address

300 N 10TH St Ste a
Hamilton, MT 59840-5322
Phone (406) 363-5434

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in UT, MT2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20180717000087 UT Practitioner - Ophthalmology 2567770415 Reassigns benefits to 2 organizations
I20190828002677 MT Practitioner - Ophthalmology 2567770415 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Ophthalmology
Education
Oregon Health Sciences University School of Medicine, 2014
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

300 N 10TH St a
Hamilton, MT 59840-5322
Phone (406) 363-5434

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
77900MTMDGlaucoma Specialist (Ophthalmology) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
University of Utah Adult Services Current Accepting new patients
Marcus Daly Memorial Hospital Corporation CurrentSince Jan 31, 2022 Accepting new patients
Marcus Daly Memorial Hospital Corporation Ophthalmology Current Accepting new patients
Marcus Daly Memorial Hospital Corporation Current Accepting new patients
University of Utah Adult Services CurrentSince May 23, 2018 Accepting new patients
University of Utah CurrentSince May 23, 2018 Accepting new patients
University of Utah Adult Services CurrentSince May 23, 2018 Accepting new patients
Marcus Daly Memorial Hospital Corporation CurrentSince Jan 31, 2022 Accepting new patients
University of Utah CurrentSince May 23, 2018 Accepting new patients
Marcus Daly Memorial Hospital Corporation CurrentSince Jan 31, 2022 Accepting new patients

Locations

1200 Westwood Dr
Hamilton, MT 59840
Phone (406) 363-2211

1224 W Main St
Hamilton, MT 59840
Phone (406) 375-4823

300 N 10th St
Ste A
Hamilton, MT 59840
Phone (406) 363-5434

65 S Mario Capecchi Dr
Salt Lake City, UT 84132
Phone (801) 581-2352

50 N Medical Dr
Slc, UT 84132
Phone (801) 581-2292

Interoperability endpoints

  • Direct secure messaging: balonzo@bitterrooteye.intellechartdirect.net
  • Direct secure messaging: brockalonzo@mdmh.cernerdirect.com

Organizations & group practices 10

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 1

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": "1396828800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1144649138",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 N 10TH ST STE A",
            "city": "HAMILTON",
            "state": "MT",
            "postal_code": "598405322",
            "telephone_number": "406-363-5434",
            "fax_number": "406-363-5210"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 N 10TH ST STE A",
            "city": "HAMILTON",
            "state": "MT",
            "postal_code": "598405322",
            "telephone_number": "406-363-5434",
            "fax_number": "406-363-5210"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ALONZO",
        "first_name": "BROCK",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2014-04-07",
        "last_updated": "2025-09-11",
        "certification_date": "2022-02-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207WX0009X",
            "taxonomy_group": "",
            "desc": "Ophthalmology, Glaucoma Specialist",
            "state": "MT",
            "license": "77900",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Hamilton, MT

Sources for this page

Verify at the official NPI Registry.