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

Ronald M Larsen, MD

Individual provider Psychiatry Physician · NPI 1306870944

Ronald M Larsen, MD is a Psychiatry Physician in Mason City, Iowa. Licensed in Iowa. Registered with an NPI since 2006.

Licensed in
IA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1000 4th St SW Mmcni Administration
Mason City, IA 50401-2800
Phone: (641) 422-7492
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 20107 (IA)

Record details

NPI number1306870944
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 10, 2006
Last updated in NPPESJuly 8, 2007
Mailing address1000 4th St Sw, Mmcni Administration, Mason City, IA 50401-2800

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