BROCK ALONZO M.D.
NPI 1144649138
Ophthalmology - Glaucoma Specialist in Hamilton, MT

Q: What is Brock Alonzo's NPI number?

The NPI number for Brock Alonzo is 1144649138. It was assigned to this individual provider in the NPPES registry on April 7, 2014.

Q: What is Brock Alonzo's specialty?

The primary specialty registered for this NPI is Ophthalmology, specializing in Glaucoma Specialist, with taxonomy code 207WX0009X.

Q: When was this NPI record last updated?

The NPPES record for Brock Alonzo was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 07, 2014PECOS Enrolled

300 N 10TH ST STE A, HAMILTON, MT 59840(406) 363-5434(406) 363-5210 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 11, 2025, Feb 22, 2022, Sep 24, 2020 and 2 more (5 updates tracked since 2018).

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About Brock Alonzo M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

BROCK ALONZO M.D. (NPI 1144649138) is an individual glaucoma specialist in Hamilton, Montana, licensed in Montana (77900) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1144649138

Entity TypeIndividualMale

Primary Taxonomy207WX0009X

Provider Legal NameBROCK ALONZOCredential: M.D.

Location Address300 N 10TH ST STE AHamilton, MT 59840-5322

Mailing Address300 N 10th St Ste AHamilton, MT 59840-5322 · (406) 363-5434 · Fax (406) 363-5210

Phone(406) 363-5434

Fax(406) 363-5210

Sole ProprietorNo

Enumeration DateApril 7, 2014

Last NPPES UpdateSeptember 11, 20255 updates tracked since enumeration

NPPES CertifiedFebruary 22, 2022

✔ NPI 1144649138 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmology · Glaucoma SpecialistAllopathic & Osteopathic Physicians

Taxonomy Code207WX0009X

License✔ Licensed in MT · 77900

Definition

An ophthalmologist who specializes in the treatment of glaucoma and other disorders related to increased intraocular pressure and optic nerve damage. This specialty involves the medical and surgical treatment of these conditions.

300 N 10TH ST STE A, Hamilton, MT 59840

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Brock Alonzo M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59840 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$130.52 typical visit price

range $56.81 – $172.26

Typical copayment $32.63 (range $14.20 – $43.06)

Most-billed visit code 99204

Established Patient

$70.82 typical visit price

range $18.24 – $140.32

Typical copayment $17.70 (range $4.56 – $35.08)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARK ALEXANDER CALDERWOOD MD

Ophthalmology

300 N 10TH ST STE A
HAMILTON, MT 59840

Ravalli County (406) 363-5434

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Brock Alonzo's NPI number?

The NPI number for Brock Alonzo is 1144649138. It was assigned to this individual provider in the NPPES registry on April 7, 2014.

Where is Brock Alonzo located?

Brock Alonzo practices at 300 N 10th St Ste A, Hamilton, MT 59840. The listed phone number is (406) 363-5434.

What is Brock Alonzo's specialty?

The primary specialty registered for this NPI is Ophthalmology, specializing in Glaucoma Specialist, with taxonomy code 207WX0009X.

Is Brock Alonzo enrolled in Medicare?

Yes. Brock Alonzo is registered in the Medicare PECOS enrollment system.

What insurance does Brock Alonzo accept?

Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP and Providence Health Plan list Brock Alonzo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Brock Alonzo was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.