Mark Thomas Dillon, MD

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.

• Indiana University Health Hospital · Indianapolis, IN
• Indiana University Health North Hospital Hospital · Carmel, IN · listed as Indiana University Health North Hospital, Inc

Colleagues at Iu Health Medical Group, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 4351 clinicians in the practice; 12 are shown here.

• Leonard T Buller, MD Orthopaedic Surgery Physician · Fishers, IN
• Michelle Lynn Catt, NP Nurse Practitioner · Martinsville, IN
• Melissa Ann Colman, RN, MSN, WHNP-BC Registered Nurse · Bloomington, IN
• Lana S Dbeibo, MD Specialist · Indianapolis, IN
• Karen A Johnson, NP Nurse Practitioner · Indianapolis, IN
• Melissa C Knutson, DO Family Medicine Physician · Avon, IN
• Dr. Joseph James Lopez, MD Surgery Physician · Muncie, IN
• Mohammed Eid Madmani, MD Internal Medicine Physician · Muncie, IN
• Tamara L Nelson, MD Internal Medicine Physician · Indianapolis, IN
• Dr. Carol A Stamm, MD Obstetrics & Gynecology Physician · Jackson, MI
• Drew Anthony Streicher, MD Neuroradiology Physician · Indianapolis, IN
• Lindsay M Weaver, MD Emergency Medicine Physician · Indianapolis, IN

Other providers in Indianapolis

• Tyler John Calton

  Individual Adult Reconstructive Orthopaedic Surgery Physician · NPI 1992382766

  1801 N Senate Blvd Ste 535, Indianapolis, IN 46202-1204 · (317) 944-9400

• Community Hospitals of Indiana Inc

  Organization Adult Reconstructive Orthopaedic Surgery Physician · NPI 1548366917

  8040 Clearvista Pkwy Ste 500, Indianapolis, IN 46256-5604 · (317) 841-8326

• Dr. Patrick Dean Millikan, MD

  Individual Adult Reconstructive Orthopaedic Surgery Physician · NPI 1598022121

  8450 NW Blvd, Indianapolis, IN 46278 · (317) 802-2000

• Sakkapol Ongwijitwat, MD

  Individual Adult Reconstructive Orthopaedic Surgery Physician · NPI 1356547095

  7930 N Shadeland Ave, Indianapolis, IN 46250-2041 · (317) 621-6725

• Timothy J Williams, MD

  Individual Adult Reconstructive Orthopaedic Surgery Physician · NPI 1336101062

  969 Hosbrook St, Indianapolis, IN 46203-1011 · (614) 205-3005