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Compare the published Medicare service mix of Kundai Kelvin Tanganyika, M.D with clinicians in the same registry specialty: Cardiovascular Disease.

CLEARLAKE, CA · 50 milesEdit location
Within 50 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 · 29 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Monica S Divakaruni, MD

Cardiovascular Disease · Saint Helena, CA

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
  • Ultrasound of heart during rest, exercise and/or drug-induced stress with report (93350)
39%Service-mix similarity~32.1 milesView profile →

Kalyan Chakravarthy Potu, M.D.

Cardiovascular Disease · Woodland, CA

Shared published services
2 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
39%Service-mix similarity~48.6 milesView profile →

Sheryl Anne Garrett, MD

Cardiovascular Disease · Petaluma, CA

Shared published services
1 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
34%Service-mix similarity~48.9 milesView profile →

Alex Rainow, MD

Cardiovascular Disease · Sonoma, CA

Shared published services
2 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
29%Service-mix similarity~47.3 milesView profile →

Pamela Maur, M.D.

Cardiovascular Disease · Santa Rosa, CA

Shared published services
2 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
28%Service-mix similarity~35.9 milesView profile →

Tomas Vasiliauskas, M.D.

Cardiovascular Disease · Santa Rosa, CA

Shared published services
2 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
28%Service-mix similarity~35.9 milesView profile →

Kenneth Joseph Tobin, DO

Cardiovascular Disease · Sonoma, CA

Shared published services
1 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
27%Service-mix similarity~47.3 milesView profile →

Thong Nguyen, D.O.

Cardiovascular Disease · Santa Rosa, CA

Shared published services
2 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
27%Service-mix similarity~35.9 milesView profile →

Jon Stephen Portnoff, M.D.

Cardiovascular Disease · Ukiah, CA

Shared published services
1 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
26%Service-mix similarity~33.0 milesView profile →

Masis Babajanian, M.D.

Cardiovascular Disease · Santa Rosa, CA

Shared published services
2 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
26%Service-mix similarity~33.4 milesView profile →

Stephen Wayne Halpern, MD

Cardiovascular Disease · Santa Rosa, CA

Shared published services
1 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
24%Service-mix similarity~35.9 milesView profile →

Sanjay Chamanlal Dhar, MD

Cardiovascular Disease · Santa Rosa, CA

Shared published services
2 shared services · view billing descriptions
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
  • Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)
24%Service-mix similarity~35.9 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.