Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Marion Reynolds McMillan III, MD

Individual provider Neurological Surgery Physician · NPI 1427037167

Marion Reynolds McMillan III, MD practises Anesthesiology in Seneca, South Carolina. Graduated from Tufts University School of Medicine in 1980, 46 years ago. Accepts Medicare assignment. Licensed in South Carolina.

Years since qualifying
46
Trained at
Tufts University School of Medicine
Licensed in
SC
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

457 E By Pass 123
Seneca, SC 29678 Not confirmed with CMS for 14 years — call before visiting
Phone: (864) 886-9888
Fax: (864) 886-9777
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Interventional Pain Medicine Physician (primary) Taxonomy 208VP0014X · Licence 15608 (SC)
Neurological Surgery Physician Taxonomy 207T00000X · Licence 15608 (SC)
Surgery Physician Taxonomy 208600000X · Licence 15608 (SC)
Anesthesiology Physician Taxonomy 207L00000X · Licence 15608 (SC)

Record details

NPI number1427037167
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 11, 2006
Last updated in NPPESMarch 29, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Also practisesINTERNAL MEDICINE, INTERVENTIONAL PAIN MANAGEMENT
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Laminectomy or laminotomy (partial removal of spine bones) 31 times · 61st percentile

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.

Medicare patients89
Services billed 234 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Other providers in Seneca