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Compare the published Medicare service mix of Nathan Micheal Richard Royal, M.D. with clinicians in the same registry specialty: Anesthesiology.

CHARLESTON, SC · Exact areaEdit location

2024 published service data · 178 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Peter A Billas, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for other procedure on urinary system through urethra (00910)
71%Service-mix similarityView profile →

Jason A Wimberly, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
67%Service-mix similarityView profile →

Matthew P Gannon, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for other procedure on urinary system through urethra (00910)
63%Service-mix similarityView profile →

Andrew Moss, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for other procedure on urinary system through urethra (00910)
61%Service-mix similarityView profile →

Warren Kirk Fowler, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
59%Service-mix similarityView profile →

Edward Dudley Colhoun, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
  • Anesthesia for retinal surgery (00145)
57%Service-mix similarityView profile →

Summar Christian Phillips, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
57%Service-mix similarityView profile →

Rebecca Lynne Payne

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
56%Service-mix similarityView profile →

Matthew John Milliron, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
56%Service-mix similarityView profile →

Kendall Headden, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
55%Service-mix similarityView profile →

Daniel Nicoli, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
  • Anesthesia for retinal surgery (00145)
55%Service-mix similarityView profile →

Peter D Goodnight, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Injection of anesthetic agent and/or steroid into other nerve or branch (64450)
  • Anesthesia for procedure for total knee joint replacement (01402)
55%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.