Sandra Mary Wischmeyer

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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.

• Franciscan Health Michigan City Hospital · Michigan City, IN

Colleagues at Indiana Surgical Associates PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 15 clinicians in the practice; 12 are shown here.

• Dr. Brendan Patrick Frawley Jr., MD Surgery Physician · Hobart, IN
• Dr. Anna Gillio, MD Student in an Organized Health Care Education/Training Program · Michigan City, IN
• Dr. Elizabeth M Herber, MD Surgery Physician · Michigan City, IN
• Mr. Joseph David Hess III, MSPAS Surgical Physician Assistant · Hobart, IN
• Sha-Ron Jackson-Johnson, MD Surgery Physician · Merrillville, IN
• Dr. Mark Allen Mueller, MD Surgery Physician · Crown Point, IN
• Christopher Ryan Mussman, DO Surgery Physician · Crown Point, IN
• Dr. Jonathan G. Patterson, DO Surgery Physician · Hobart, IN
• Dr. James Van Siatras, DO Surgery Physician · Olympia Fields, IL
• Dr. Dana-Rachael Smith, MD Surgery Physician · Crown Point, IN
• Bruce J Stoehr Jr., MD Surgery Physician · Michigan City, IN
• Dr. Eric M Woo, DO Surgery Physician · Crown Point, IN

Other providers in Michigan City

• Aaron Joseph Schneider, MD

  Individual Surgery Physician · NPI 1134548563

  3500 Franciscan Way Ste 3A, Michigan City, IN 46360-0021 · (219) 861-8828

• Bruce J Stoehr Jr., MD

  Individual Surgery Physician · NPI 1588734453

  1507 Wabash St Ste 400D, Michigan City, IN 46360-4361 · (219) 861-8828

• Matthew G Troy, MD

  Individual Surgery Physician · NPI 1275528093

  3500 Franciscan Way Ste 300, Michigan City, IN 46360-0021 · (219) 879-6531

• Kristopher B. Williams, MD

  Individual Surgery Physician · NPI 1548441009

  3500 Franciscan Way Ste 3A, Michigan City, IN 46360-0033 · (219) 861-8828