Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Donald Walter Theisen Wessel, MD

Individual provider Internal Medicine Physician · NPI 1538142518

Dr. Donald Walter Theisen Wessel, MD practises Internal Medicine in Stillwater, Minnesota. Graduated from University of California, San Diego School of Medicine in 1989, 37 years ago. Practices with Group Health Plan Inc, a 1,633-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Minnesota.

Years since qualifying
37
Trained at
University of California, San Diego School of Medicine
Licensed in
MN
In the registry since
2005
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

1500 Curve Crest Blvd Stillwater Medical Group
Stillwater, MN 55082-6040
Phone: (651) 439-1234
Fax: (651) 275-3325
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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 33844 (MN)

Record details

NPI number1538142518
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 23, 2005
Last updated in NPPESNovember 26, 2019

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Group Health Plan Inc — 1633 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times
Removal or shaving of skin growth 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients689
Services billed 6,721 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Hudson Hospital Hospital · Hudson, WI
  • Lakeview Memorial Hospital Hospital · Stillwater, MN · listed as Lakeview Memorial Hospital Assn, Inc
  • Regions Hospital Hospital · Saint Paul, MN
  • Westfields Hospital And Clinic Hospital · New Richmond, WI · listed as Westfields Hospital & Clinic
  • Accentcare Fairview Home Health - East Llc Home health agency · Oakdale, MN · listed as Accentcare Fairview Home Health - East, LLC
  • Home Health Care Inc Home health agency · Golden Valley, MN · listed as Summit Home Health Care, Inc
  • Amery Hospital & Clinic Hospital · Amery, WI
  • Adoray Home Health And Hospice Home health agency · Baldwin, WI
  • Lakeview Homecare Home health agency · Oak Park Heights, MN
  • Lakeview Hospice Hospice · Oak Park Heights, MN

Colleagues at Group Health Plan Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1633 clinicians in the practice; 12 are shown here.

Other providers in Stillwater