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

Mark Alexander Calderwood, MD

Individual provider Ophthalmology Physician · NPI 1447353024

Mark Alexander Calderwood, MD is an Ophthalmology Physician in Hamilton, Montana. Practices as a sole proprietor. Licensed in Montana.

Licensed in
MT
In the registry since
2006
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

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence MED-PHYS-LIC-7129 (MT)

Record details

NPI number1447353024
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 7, 2006
Last updated in NPPESNovember 12, 2024
Certification dateNovember 12, 2024

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