Michael M. Karkkainen, DO

Medicare activity in 2024

Official CMS public-use data for Michael M. Karkkainen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)63 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)52 services
3. Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)42 services
4. Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)39 services
5. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)25 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Arthritis53%
• Ischemic heart disease43%
• Chronic kidney disease43%
• Diabetes37%

Hospitals where Michael M. Karkkainen works

Medicare's Facility Affiliation Data lists Michael M. Karkkainen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Aurora Medical Center Bay AreaMarinette, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520113

Practice locations

Addresses where Michael M. Karkkainen is enrolled with Medicare (CMS data updated October 2, 2026).

• 3003 University DrMarinette, WI 54143 (715) 735‑6621

Group practices

Medicare enrollment lists Michael M. Karkkainen as a member of this group (CMS data updated October 2, 2026).

• Aurora Medical Group, Inc.3,813 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in Wisconsin →

Other general surgeons in Wisconsin

Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.

• Nicholas E. Coorough, MD
• Holly R. Ortman, MD
• Stephanie C. Carr, DO
• Janeil M. Mitchell, MD
• Amy A. Lloyd, MD
• Crystal Lumi, MD
• Benjamin Abadeer, MD
• Nicholas Kitowski, MD

All general surgeons in Wisconsin →

Other clinicians in Aurora Medical Group, Inc.

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Pamela A. Xiong
• Debra L. Arrowood
• Katherine L. Pampuch, NP
• Sarah L. Bahe, NP
• Amanda J. Mueller
• Miya Rogers

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians