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Compare the published Medicare service mix of Karthikeyan Viswanathan, DO with clinicians in the same registry specialty: Internal Medicine.

LOS ALTOS, CA · 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 · 481 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Theresa Greco, MD

Internal Medicine · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Hemoglobin a1c level (83036)
72%Service-mix similarity~4.5 milesView profile →

Sarah Robinson, MD

Internal Medicine · Palo Alto, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
28%Service-mix similarity~5.4 milesView profile →

Benjamin Chun-Bang Weia, MD

Internal Medicine · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
24%Service-mix similarity~4.5 milesView profile →

Mariam Robert Manoukian, MD

Internal Medicine · Mountain View, CA

Shared published services
1 shared services · view billing descriptions
  • Hemoglobin a1c level (83036)
22%Service-mix similarity~1.4 milesView profile →

Mary Varghese, MD

Internal Medicine · Palo Alto, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
21%Service-mix similarity~5.4 milesView profile →

Jason W Bae, MD

Internal Medicine · Palo Alto, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
21%Service-mix similarity~5.4 milesView profile →

Kevin Fong-Wei Kuo, MD

Internal Medicine · Menlo Park, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
16%Service-mix similarity~6.2 milesView profile →

Geeta Krishnapriyan, MD

Internal Medicine · Mountain View, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
16%Service-mix similarity~1.4 milesView profile →

Lorna Marie Thornton, MD

Internal Medicine · Menlo Park, CA

Shared published services
1 shared services · view billing descriptions
  • Hemoglobin a1c level (83036)
15%Service-mix similarity~6.2 milesView profile →

Ping Wang Fisher, MD

Internal Medicine · Menlo Park, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
15%Service-mix similarity~6.2 milesView profile →

Linda Hannah Fresco, MD

Internal Medicine · Menlo Park, CA

Shared published services
1 shared services · view billing descriptions
  • Automated urinalysis test (81003)
14%Service-mix similarity~6.2 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.