Mason Jon Witte, NP

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

• Holland Hospital Hospital · Holland, MI
• Spectrum Health Hospital · Grand Rapids, MI · listed as Spectrum Health Hospital
• University Of Michigan Health - West Hospital · Wyoming, MI · listed as University of Michigan Health-West Outpatient Pharmacy
• Corewell Health Zeeland Hospital Hospital · Zeeland, MI

Colleagues at Spectrum Health Primary Care Partners

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2303 clinicians in the practice; 12 are shown here.

• Musa Issa Dahu, MD Cardiovascular Disease Physician · Grand Rapids, MI
• Josip Divic, MD Internal Medicine Physician · Grand Rapids, MI
• MS. Alexandra Engler, RDN Registered Dietitian · Grand Rapids, MI
• Dr. John Joseph Gribar, MD, MHSC Cardiovascular Disease Physician · Holland, MI
• Dr. Ryan J Hadley, MD Pulmonary Disease Physician · Grand Rapids, MI
• Dr. Levi Hinkelman Orthopaedic Hand Surgery Physician · Grand Rapids, MI
• Randall Klein, PA Physician Assistant · Holland, MI
• Anne M McCarthy, MD Internal Medicine Physician · Grand Rapids, MI
• Derek Olson, DO Internal Medicine Physician · Kentwood, MI
• Dr. David M Stone, DO Pediatrics Physician · Lansing, MI
• Todd W Vitaz, MD Neurological Surgery Physician · Grand Rapids, MI
• Jayne Josephina Bailey Von Kulajta Winn, PA-C Physician Assistant · Grand Rapids, MI

Other providers in Grand Rapids

• Amy Elizabeth Veltkamp, NP

  Individual Gerontology Nurse Practitioner · NPI 1144879875

  1900 Wealthy St SE Ste 200, Grand Rapids, MI 49506-2969 · (616) 774-0276

• Jacquelyn Renee Vorachek, NP

  Individual Gerontology Nurse Practitioner · NPI 1154893956

  100 Michigan St NE # MC031, Grand Rapids, MI 49503-2560 · (616) 267-8244

• Emily Jean Wilson, AGNP-C

  Individual Gerontology Nurse Practitioner · NPI 1083599740

  200 Jefferson Ave SE, Grand Rapids, MI 49503-4502 · (616) 685-5050

• Joshua Dennis Witherspoon, NP

  Individual Gerontology Nurse Practitioner · NPI 1790323970

  145 Michigan St NE Ste 3410, Grand Rapids, MI 49503-2563 · (616) 391-9945