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Dr. William M. Reynders, MD

Family Medicine (Family Medicine Physician)

  • Medicare participating

At a glance

In the NPI registry since
2005
Medicare patients seen, 2024
98

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Family Medicine Physician primary
    WI license 28059

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Family Medicine per capita by county →

Medicare patients and services

Medicare patients, 2024
98
Services billed
142
Patients’ average age
71
Most frequent Medicare services, 2023
ServiceTimesPatients
Sarscv2 vac 30mcg trs-suc im133133
Established patient office or other outpatient visit, 30-39 minutes4343
Admn sarscov2 vacc 1 dose2929
Sarscov2 vac 50 mcg/0.5ml im2727
Established patient office or other outpatient visit, 20-29 minutes2626
Administration of influenza virus vaccine2424
Influenza vaccine split virus, preservative free2323
Adm sarscv2 bvl 30mcg/.3ml a1717

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Medicare prescriptions

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Family Medicine clinicians in Green Bay

Sources

NPI registry (CMS NPPES, November 2026; record last updated March 14, 2014), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1225012875. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.