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Compare the published Medicare service mix of Johnny Sia Gaw, M.D. with clinicians in the same registry specialty: Cardiovascular Disease.

MONROVIA, 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 · 49 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Tom Thao Yeh, M.D.

Cardiovascular Disease · Rosemead, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Administration of influenza virus vaccine (G0008)
37%Service-mix similarity~7.4 milesView profile →

Michael K. Cao, MD

Cardiovascular Disease · Rosemead, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
34%Service-mix similarity~7.4 milesView profile →

Greg Shih-Han Yen, M.D.

Cardiovascular Disease · San Gabriel, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
29%Service-mix similarity~6.7 milesView profile →

Karl Heiner Vogelbach, MD

Cardiovascular Disease · Arcadia, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
28%Service-mix similarity~1.8 milesView profile →

Kalyanasundara Venkataraman, MD

Cardiovascular Disease · Duarte, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
27%Service-mix similarity~2.5 milesView profile →

Henry C Yee, MD

Cardiovascular Disease · Alhambra, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
26%Service-mix similarity~8.3 milesView profile →

Syed A Samee, MD

Cardiovascular Disease · Duarte, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
25%Service-mix similarity~2.5 milesView profile →

James Hou Liu, M.D.

Cardiovascular Disease · San Gabriel, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Administration of influenza virus vaccine (G0008)
23%Service-mix similarity~6.7 milesView profile →

Tanvir Hussain, M.D.

Cardiovascular Disease · Pasadena, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
22%Service-mix similarity~7.9 milesView profile →

Mir Taqui Ali, M.D.

Cardiovascular Disease · Arcadia, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
22%Service-mix similarity~3.3 milesView profile →

Stephanie Wu

Cardiovascular Disease · Duarte, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
21%Service-mix similarity~2.5 milesView profile →

Steven Chan

Cardiovascular Disease · San Gabriel, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
21%Service-mix similarity~6.7 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.