Nathanial I. Kieler, MD

Medicare activity in 2024

Official CMS public-use data for Nathanial I. Kieler, 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. Special stained specimen slides to examine tissue, each additional procedure (88341)568 services
2. Pathology examination of tissue using a microscope, intermediate complexity (88305)429 services
3. Special stained specimen slides to examine tissue, initial procedure (88342)143 services
4. Insertion of needle into vein for collection of blood sample (36415)97 services
5. Pathology examination of tissue using a microscope, moderately high complexity (88307)65 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%
• Arthritis43%
• Ischemic heart disease32%
• Chronic kidney disease32%
• Diabetes30%

Hospitals where Nathanial I. Kieler works

Medicare's Facility Affiliation Data lists Nathanial I. Kieler 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.

• Bellin Health Oconto HospitalOconto, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521356
• Bellin Memorial HospitalGreen Bay, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520049
• Gundersen Lutheran Medical CenterLa Crosse, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520087

Practice locations

Addresses where Nathanial I. Kieler is enrolled with Medicare (CMS data updated October 2, 2026).

• 744 S Webster AveGreen Bay, WI 54301 (920) 433‑6025

Group practices

Medicare enrollment lists Nathanial I. Kieler as a member of these groups (CMS data updated October 2, 2026).

• Bellin Memorial Hospital Inc697 clinicians in the group
• Pathology Consultants of Green Bay SC6 clinicians in the group

Specialties

• Pathologyprimary

Find other Pathology doctors in Wisconsin →

Other pathologists in Green Bay

Clinicians with the same Medicare primary specialty in Green Bay, WI — not a recommendation.

• Oliver W. Graf, MD
• Xiaomin Zheng, MD
• Robert J. Murphy, MD
• Charles F. Dais Ii, MD
• Robert T. Cutlan, MD
• Patrick M. McDonough, MD
• Jiaxin Cai, MD
• Ziwen Guo, MD

All pathologists in Green Bay →

Other clinicians in Bellin Memorial Hospital Inc

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

• Jill A. Esterly Jayne
• David A. Knuff, MD
• Kathryn A. Blaser, PT
• Victoria Passov, MD
• Rebecca A. Vanden Langenberg
• Daniel E. Krueger, PT

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