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Compare the published Medicare service mix of Thomas Nguyen, M.D. with clinicians in the same registry specialty: Internal Medicine · Nephrology (CMS).

BOYNTON BEACH, FL · 10 milesEdit location
Within 10 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 · 21 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

David Adam Scott, M.D.

Internal Medicine · Nephrology (CMS) · Delray Beach, FL

Shared published services
1 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)
43%Service-mix similarity~5.2 milesView profile →

Jhon Saul Guzman-Rivera, M.D.

Nephrology (CMS) · Atlantis, FL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
33%Service-mix similarity~3.8 milesView profile →

Rafael Elliot Valenzuela-Tapia, D.O, M.D

Internal Medicine (CMS) · Delray Beach, FL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
33%Service-mix similarity~5.2 milesView profile →

Osvaldo F. Valenzuela, M.D.

Nephrology (CMS) · Atlantis, FL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
30%Service-mix similarity~3.8 milesView profile →

Hitesh Kapupara, M.D

Internal Medicine · Nephrology · Neurology (CMS) · Atlantis, FL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
30%Service-mix similarity~3.8 milesView profile →

Lon M Sadowsky, D.O.

Nephrology (CMS) · Delray Beach, FL

Shared published services
1 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)
30%Service-mix similarity~5.2 milesView profile →

Freya Jan Silverstein, MD

Nephrology (CMS) · Atlantis, FL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
30%Service-mix similarity~3.8 milesView profile →

Armen Margaryan, M.D.

Internal Medicine · Neurology (CMS) · Delray Beach, FL

Shared published services
1 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)
29%Service-mix similarity~5.2 milesView profile →

Malak El-Rahi, MD

Nephrology (CMS) · Boca Raton, FL

Shared published services
1 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)
24%Service-mix similarity~9.6 milesView profile →

Marc Spencer Richards, MD

Internal Medicine · Nephrology (CMS) · Boca Raton, FL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
24%Service-mix similarity~8.0 milesView profile →

Zoey Levine

Internal Medicine · Nephrology (CMS) · Delray Beach, FL

Shared published services
1 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)
23%Service-mix similarity~4.8 milesView profile →

Ira Louis Lazar, MD

Internal Medicine · Nephrology (CMS) · Boca Raton, FL

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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
23%Service-mix similarity~9.6 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.