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

John M Evelsizer Olson, PA-C

Individual provider Medical Physician Assistant · NPI 1639483001

John M Evelsizer Olson, PA-C is a Physician Assistant in Decorah, Iowa. Graduated from University of Colorado School of Medicine, Denver in 2010, 16 years ago. Practices with Winneshiek Medical Center, a 99-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
16
Trained at
University of Colorado School of Medicine, Denver
Licensed in
IA
In the registry since
2010
Specialties on file
2
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

See every abbreviation used in this directory →

Practice location Address checks out

901 Montgomery St
Decorah, IA 52101-2325
Phone: (563) 382-2911
Fax: (563) 387-3102
Show map & directions

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

Specialties & licences

Surgical Physician Assistant (primary) Taxonomy 363AS0400X · Licence 082179 (IA)
Medical Physician Assistant Taxonomy 363AM0700X · Licence 082179 (IA)

Record details

NPI number1639483001
Entity typeIndividual (Type 1)
GenderMale
Credentials PA-C
Sole proprietorNo
NPI enumeratedJuly 28, 2010
Last updated in NPPESJanuary 13, 2025
Certification dateJanuary 13, 2025
Mailing address901 Montgomery St, Decorah, IA 52101-2325

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolUNIVERSITY OF COLORADO SCHOOL OF MEDICINE, DENVER
Graduated 2010 (16 years in practice)
Group practice Winneshiek Medical Center — 99 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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