Mark C Callanan, 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. Those with a page here are linked.

• Willis Knighton Medical Center Hospital · Shreveport, LA · listed as Willis Knighton Medical Center, Inc
• Christus Shreveport-Bossier Health System Hospital · Shreveport, LA
• Centerwell Home Health Home health agency · Coushatta, LA
• Louisiana Homecare Home health agency · Mansfield, LA

Colleagues at Wk Orthopedic Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 21 clinicians in the practice; 12 are shown here.

• Richard Shane Barton, MD Sports Medicine (Orthopaedic Surgery) Physician · Shreveport, LA
• Suzanne M Burke, PA Physician Assistant · Shreveport, LA
• Lacey Hauser Byram, PA Physician Assistant · Shreveport, LA
• Raquel Dawson Physician Assistant · Shreveport, LA
• Sara Catherine Elliott, FNP-C Family Nurse Practitioner · Shreveport, LA
• John J Ferrell, MD Orthopaedic Surgery Physician · Shreveport, LA
• Scott R Gillum, PA Surgical Physician Assistant · Shreveport, LA
• Dr. Richard M Harrell, MD Orthopaedic Surgery Physician · Shreveport, LA
• Dr. Sylvanus Ly, DO Family Medicine Physician · Shreveport, LA
• Milan G Mody, MD Orthopaedic Surgery of the Spine Physician · Shreveport, LA
• Jeanette Catherine Pang, PA-C Physician Assistant · Shreveport, LA
• Cambize Shahrdar, MD Orthopaedic Surgery Physician · Shreveport, LA

Other providers in Shreveport

• Steven M Atchison, MD

  Individual Orthopaedic Surgery Physician · NPI 1447242276

  1500 Line Ave Ste 100, Shreveport, LA 71101 · (318) 635-3052

• Harold Ryan Bicknell Jr., MD

  Individual Orthopaedic Surgery Physician · NPI 1245268762

  7925 Youree Dr Ste 200, Shreveport, LA 71105-5538 · (318) 798-6700

• James Scott Bicknell, MD

  Individual Orthopaedic Surgery Physician · NPI 1457389314

  7925 Youree Dr Ste 200, Shreveport, LA 71105-5538 · (318) 798-6700

• Christopher Caldwell, MD

  Individual Orthopaedic Surgery Physician · NPI 1407346802

  7925 Youree Dr Ste 200, Shreveport, LA 71105-5134 · (318) 212-3610

• Cambize Shahrdar MD and Willis-Knighton Medical Center

  Organization Orthopaedic Surgery Physician · NPI 1417986548

  7925 Youree Dr Ste 200, Shreveport, LA 71105-5127 · (318) 798-6700

• Brad Chauvin, MD

  Individual Orthopaedic Surgery Physician · NPI 1316158066

  1541 Kings Hwy, Shreveport, LA 71103-4228 · (318) 626-0000

• Marjorie R Chelly, MD

  Individual Orthopaedic Surgery Physician · NPI 1033269303

  510 E Stoner Ave, Shreveport, LA 71101-4243 · (318) 221-8411

• Stephen L. Cox, MD

  Individual Orthopaedic Surgery Physician · NPI 1164427829

  1500 Line Ave Ste 100, Shreveport, LA 71101-4644 · (318) 635-3052