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Compare the published Medicare service mix of Daniel Gregory Luba, M.D. with clinicians in the same registry specialty: Gastroenterology (CMS).

GONZALES, CA · 25 milesEdit location
Within 25 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 13 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Steven G Johnson, M.D

Gastroenterology · Internal Medicine (CMS) · Salinas, CA

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
75%Service-mix similarity~18.5 milesView profile →

Richard Walter Hell, M.D.

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
75%Service-mix similarity~24.9 milesView profile →

Toby J Katz, M.D.

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
75%Service-mix similarity~24.9 milesView profile →

Jeffrey Peter Fiorenza, M.D.

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
75%Service-mix similarity~24.9 milesView profile →

Michael Joel Mendoza, M.D.

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
72%Service-mix similarity~24.9 milesView profile →

Jan Kamler, MD

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
71%Service-mix similarity~24.9 milesView profile →

Vikram Rameshchandra Patel, MD

Gastroenterology (CMS) · Salinas, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
71%Service-mix similarity~18.5 milesView profile →

Michael Sang Le, M.D.

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
68%Service-mix similarity~24.9 milesView profile →

Kathryn A Swanson, M.D.

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
67%Service-mix similarity~24.9 milesView profile →

Isabelle Barnard Moonan, M.D.

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
62%Service-mix similarity~24.9 milesView profile →

David Chapman Parsons, MD

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
57%Service-mix similarity~24.9 milesView profile →

Steve Hu

Gastroenterology (CMS) · Monterey, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
57%Service-mix similarity~24.9 milesView 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 approximate distance 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.