Pieter Wiersema, MD

Medicare activity in 2024

Official CMS public-use data for Pieter Wiersema, 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. Pathology examination of tissue using a microscope, intermediate complexity (88305)251 services
2. Special stained specimen slides to examine tissue, each additional procedure (88341)84 services
3. Special stained specimen slides to examine tissue, initial procedure (88342)46 services
4. Special stained specimen slides to identify organisms including interpretation and report (88312)29 services
5. Special stained specimen slides to examine tissue including interpretation and report (88313)28 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 cholesterol69%
• Arthritis47%
• Diabetes34%
• Chronic kidney disease28%
• Anxiety26%

Hospitals where Pieter Wiersema works

Medicare's Facility Affiliation Data lists Pieter Wiersema 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.

• Johnson Memorial HospitalFranklin, IN · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 150001

Practice locations

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

• 1125 W Jefferson StFranklin, IN 46131 (317) 346‑3858

Group practices

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

• Johnson Memorial Hospital39 clinicians in the group

Specialties

• Pathologyprimary

Find other Pathology doctors in Indiana →

Other pathologists in Indiana

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

• John Henley, MD
• Leonard Yenwongfai, MD
• William R. Bell, MD
• Bamidele A. Adeagbo, MD
• Blake R. Nestok, MD
• Michelle K. Zimmerman, MD
• Alan F. Smith Jr., MD
• Bianca Puello, MD

All pathologists in Indiana →

Other clinicians in Johnson Memorial Hospital

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

• Grant M. Kristo
• Kurt M. Terrell, MD
• Douglas Y. Roese, MD
• Teal R. Murphy, MD
• Michelle O Brien, MD
• Cassandra S. Schwach

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