Anna Seydel, MD

Medicare activity in 2024

Official CMS public-use data for Anna Seydel, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)56 services
2. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)24 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)13 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).

• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High cholesterol62%
• High blood pressure59%
• Diabetes31%
• Arthritis28%
• Osteoporosis25%

Hospitals where Anna Seydel works

Medicare's Facility Affiliation Data lists Anna Seydel 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.

• Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 520037

Practice locations

Addresses where Anna Seydel is enrolled with Medicare (CMS data updated October 2, 2026).

• 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511

Group practices

Medicare enrollment lists Anna Seydel as a member of this group (CMS data updated October 2, 2026).

• MCHS Hospitals Inc1,197 clinicians in the group

Specialties

• Surgical Oncologyprimary
• General Surgeryalso

Find other Surgical Oncology doctors in Wisconsin →

Other surgical oncologists in Wisconsin

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

• Jessica A. Wernberg, MD
• Rohit Sharma, MD
• Callisia N. Clarke, MD
• Meeghan A. Lautner, MD
• Heather B. Neuman, MD
• Jasmine C. Walker, MD
• Julie A. Kepple, MD
• Rebecca M. Minter, MD

All surgical oncologists in Wisconsin →

Other clinicians in MCHS Hospitals Inc

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

• Ramesh Ashwath, MD
• Juan E. Mesa, MD
• Michael J. Darr, NP
• Ashley R. Spurlock, CNA
• Kristina Kochanova
• Mark Marmande, CNA

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