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

Katrina Ruth Hammel, MD

Individual provider Internal Medicine Physician · NPI 1780894527

Katrina Ruth Hammel, MD is an Internal Medicine in Winona, Minnesota. Graduated from University of Iowa, Rj & L Carver College of Medicine in 2005, 21 years ago. Practices with Winona Health Services, a 161-clinician group and accepts Medicare assignment. Licensed in Iowa, Minnesota and Wisconsin.

Years since qualifying
21
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
IA, MN, WI
In the registry since
2007
Specialties on file
3
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

855 Mankato Ave
Winona, MN 55987-4868
Phone: (507) 454-3650
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 55911 (MN)
Internal Medicine Physician Taxonomy 207R00000X · Licence 37932 (IA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 54557 (WI)

Record details

NPI number1780894527
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 23, 2007
Last updated in NPPESFebruary 6, 2013
Mailing address855 Mankato Ave, Winona, MN 55987-4868

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Winona Health Services — 161 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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