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Compare the published Medicare service mix of William Colin Gallahan, M.D. with clinicians in the same registry specialty: Internal Medicine.

WINSTON SALEM, NC · Exact areaEdit location

2024 published service data · 104 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Tilak Raj Baba

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
71%Service-mix similarityView profile →

Michael George Noujaim, M.D.

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
63%Service-mix similarityView profile →

Christina Mia Rinaldi, DO

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
56%Service-mix similarityView profile →

Michael John Varney, MD

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
52%Service-mix similarityView profile →

John Paul Velasco, M.D.

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
48%Service-mix similarityView profile →

Matthew Nigel Hugh Ellis, MD

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
43%Service-mix similarityView profile →

Kirsten Brantley Feiereisel, MD

Internal Medicine · Winston Salem, NC

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
42%Service-mix similarityView profile →

Jeremy Thomas Gillespie, M.D.

Internal Medicine · Winston Salem, NC

Shared published services
2 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
42%Service-mix similarityView profile →

James Lucius Wofford, MD

Internal Medicine · Winston Salem, NC

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
42%Service-mix similarityView profile →

Alfred Gabrial Rabinovich, MD

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
41%Service-mix similarityView profile →

Jiaqian Xu, MD

Internal Medicine · Winston Salem, NC

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
41%Service-mix similarityView profile →

Joseph James Pierce, MD

Internal Medicine · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
41%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.