Dr. Mark R. Mainous, MD
General Surgery (Surgical Critical Care Physician)
- Medicare participating
At a glance
- Medical school
- University of Mississippi School of Medicine (1986)
- Years since graduation
- 40
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 197
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
- 1986Medical school: University of Mississippi School of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
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
-
Surgical Critical Care Physician primary
LA license 07555R
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Willis Knighton Medical Center Shreveport, LA
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 197
- Services billed
- 424
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| New patient office or other outpatient visit, 30-44 minutes | 57 | 57 |
| Established patient office or other outpatient visit, 10-19 minutes | 42 | 26 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 41 | 20 |
| New patient office or other outpatient visit, 15-29 minutes | 32 | 32 |
| Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 29 | 28 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 28 | 28 |
| Removal of gallbladder using an endoscope | 26 | 26 |
| Established patient office or other outpatient visit, 20-29 minutes | 15 | 14 |
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
| Drug | Prescriptions |
|---|---|
| Tramadol Hcl Other prescribers in Shreveport, LA | 39 |
| Hydrocodone-Acetaminophen (hydrocodone/acetaminophen) Other prescribers in Shreveport, LA | 33 |
| Minocycline Hcl Other prescribers in Shreveport, LA | 26 |
| Ondansetron Hcl Other prescribers in Shreveport, LA | 14 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 4 companies reported 28 payments worth $19,256 in total to this clinician.
| Heron Therapeutics, Inc. | $18,887 |
|---|---|
| Sanara Medtech Inc. | $261 |
| Ethicon US, LLC | $84.64 |
| Innovation Technologies Inc | $23.42 |
| Compensation for services other than consulting (speaking, faculty) | $15,750 |
|---|---|
| Travel and Lodging | $2,378 |
| Food and Beverage | $1,128 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Heron Therapeutics, Inc. Jan 24, 2025 | Compensation for services other than consulting (speaking, faculty) APONVIE; ZYNRELEF · NAUSEAVOMITING | $5,625 |
| Heron Therapeutics, Inc. Jul 16, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $3,375 |
| Heron Therapeutics, Inc. Aug 12, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $3,375 |
| Heron Therapeutics, Inc. Jul 15, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $2,250 |
| Heron Therapeutics, Inc. Mar 13, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $1,125 |
| Heron Therapeutics, Inc. Jan 24, 2025 | Travel and Lodging APONVIE; ZYNRELEF · NAUSEAVOMITING · travel to CHANDLER, AZ | $844 |
| Heron Therapeutics, Inc. Aug 12, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to NORTHVILLE TOWNSHIP, MI | $506 |
| Heron Therapeutics, Inc. Jul 16, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to METAIRIE, LA | $445 |
| Heron Therapeutics, Inc. Aug 12, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to NORTHVILLE TOWNSHIP, MI | $194 |
| Heron Therapeutics, Inc. Jul 16, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to METAIRIE, LA | $188 |
All 13 payments other than meals, newest first
| Company | What it was for | Amount |
|---|---|---|
| Heron Therapeutics, Inc. Aug 12, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $3,375 |
| Heron Therapeutics, Inc. Aug 12, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to NORTHVILLE TOWNSHIP, MI | $506 |
| Heron Therapeutics, Inc. Aug 12, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to NORTHVILLE TOWNSHIP, MI | $194 |
| Heron Therapeutics, Inc. Aug 12, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to NORTHVILLE TOWNSHIP, MI | $127 |
| Heron Therapeutics, Inc. Jul 16, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $3,375 |
| Heron Therapeutics, Inc. Jul 16, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to METAIRIE, LA | $445 |
| Heron Therapeutics, Inc. Jul 16, 2025 | Travel and Lodging ZYNRELEF · POST SURGICAL PAIN RELIEF · travel to METAIRIE, LA | $188 |
| Heron Therapeutics, Inc. Jul 15, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $2,250 |
| Heron Therapeutics, Inc. Mar 13, 2025 | Compensation for services other than consulting (speaking, faculty) ZYNRELEF · POST SURGICAL PAIN RELIEF | $1,125 |
| Heron Therapeutics, Inc. Jan 26, 2025 | Travel and Lodging APONVIE; ZYNRELEF · NAUSEAVOMITING · travel to CHANDLER, AZ | $45.00 |
| Heron Therapeutics, Inc. Jan 24, 2025 | Compensation for services other than consulting (speaking, faculty) APONVIE; ZYNRELEF · NAUSEAVOMITING | $5,625 |
| Heron Therapeutics, Inc. Jan 24, 2025 | Travel and Lodging APONVIE; ZYNRELEF · NAUSEAVOMITING · travel to CHANDLER, AZ | $844 |
| Heron Therapeutics, Inc. Jan 24, 2025 | Travel and Lodging APONVIE; ZYNRELEF · NAUSEAVOMITING · travel to CHANDLER, AZ | $29.43 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.