Dr. Mark G. Buchanan, M.D.
Urology (Urology Physician)
- Medicare participating
At a glance
- Medical school
- University of Tennessee, Hsc, College of Medicine (1996)
- Years since graduation
- 30
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 1,006
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
- 1996Medical school: University of Tennessee, Hsc, College of Medicine
- 2005Registered 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
-
Urology Physician primary
SC license 019842
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Roper Hospital Charleston, SC
- Bon Secours-St Francis Xavier Hospital Charleston, SC
- Roper St Francis Hospital-Berkeley Inc Summerville, SC
- Mount Pleasant Hospital Mount Pleasant, SC
Medical groups
- Lowcountry Urology Clinics, PA (14 clinicians)
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
- 1,006
- Services billed
- 8,458
- Patients’ average age
- 76
| Service | Times | Patients |
|---|---|---|
| Urinalysis, manual test | 1,560 | 808 |
| Established patient office or other outpatient visit, 30-39 minutes | 971 | 572 |
| Established patient office or other outpatient visit, 20-29 minutes | 685 | 510 |
| Insertion of needle into vein for collection of blood sample | 366 | 246 |
| Ultrasound measurement of bladder capacity after voiding | 316 | 235 |
| New patient office or other outpatient visit, 45-59 minutes | 136 | 136 |
| Diagnostic exam of bladder and urethra using an endoscope | 81 | 64 |
| Established patient office or other outpatient visit, 40-54 minutes | 25 | 23 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 24 | 23 |
| Insertion of sacral nerve neurostimulator electrode array | 23 | 13 |
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 |
|---|---|
| Tamsulosin Hcl Other prescribers in Charleston, SC | 533 |
| Myrbetriq (mirabegron) Other prescribers in Charleston, SC | 173 |
| Finasteride Other prescribers in Charleston, SC | 164 |
| Sulfamethoxazole-Trimethoprim (sulfamethoxazole/trimethoprim) Other prescribers in Charleston, SC | 98 |
| Ciprofloxacin Hcl Other prescribers in Charleston, SC | 93 |
| Solifenacin Succinate Other prescribers in Charleston, SC | 61 |
| Gemtesa (vibegron) Other prescribers in Charleston, SC | 55 |
| Nitrofurantoin (nitrofurantoin macrocrystal) Other prescribers in Charleston, SC | 54 |
| Hydrocodone-Acetaminophen (hydrocodone/acetaminophen) Other prescribers in Charleston, SC | 44 |
| Nitrofurantoin Mono-Macro (nitrofurantoin monohyd/m-cryst) Other prescribers in Charleston, SC | 31 |
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, 24 companies reported 59 payments worth $1,605 in total to this clinician.
| Medtronic, Inc. | $316 |
|---|---|
| Olympus America Inc. | $220 |
| Janssen Biotech, Inc. | $116 |
| Bioprotect Medical, Inc. | $93.23 |
| Pfizer Inc. | $87.01 |
| Sumitomo Pharma America, Inc. | $68.72 |
| Tolmar, Inc. | $65.53 |
| Teleflex LLC | $63.49 |
| Food and Beverage | $1,570 |
|---|---|
| Education | $35.06 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| AstraZeneca Pharmaceuticals LP Nov 13, 2025 | Education IMFINZI · Oncology · in-kind Company’s descriptionJournal Article | $35.06 |
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.