Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Brock Alonzo, MD

Individual provider Glaucoma Specialist (Ophthalmology) Physician · NPI 1144649138

Brock Alonzo, MD is an Ophthalmology in Hamilton, Montana. Graduated from Oregon Health Sciences University School of Medicine in 2014, 12 years ago. Practices with Marcus Daly Memorial Hospital Corporation, a 97-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
12
Trained at
Oregon Health Sciences University School of Medicine
Licensed in
MT
In the registry since
2014
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

300 N 10th St Ste A
Hamilton, MT 59840-5322
Phone: (406) 363-5434
Fax: (406) 363-5210
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Glaucoma Specialist (Ophthalmology) Physician (primary) Taxonomy 207WX0009X · Licence 77900 (MT)

Record details

NPI number1144649138
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 7, 2014
Last updated in NPPESSeptember 11, 2025
Certification dateFebruary 22, 2022
Mailing address300 N 10th St Ste A, Hamilton, MT 59840-5322

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolOREGON HEALTH SCIENCES UNIVERSITY SCHOOL OF MEDICINE
Graduated 2014 (12 years in practice)
Group practice Marcus Daly Memorial Hospital Corporation — 97 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount