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

Dr. Gerald Irvin Geiszler, MD

Individual provider Emergency Medicine Physician · NPI 1841344132

Dr. Gerald Irvin Geiszler, MD is an Emergency Medicine Physician in Great Falls, Montana. Practices as a sole proprietor. Licensed in Montana.

Licensed in
MT
In the registry since
2007
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

1101 26th St S
Great Falls, MT 59405-5161
Phone: (406) 761-6383
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 4282 (MT)

Record details

NPI number1841344132
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 23, 2007
Last updated in NPPESJuly 8, 2007

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