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Compare the published Medicare service mix of Karen Jean Friday, MD with clinicians in the same registry specialty: Cardiovascular Disease.

STANFORD, CA · Exact areaEdit location

2024 published service data · 60 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Patricia Kim Phuong Nguyen, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
97%Service-mix similarityView profile →

Francis Henry Koch, MD

Cardiovascular Disease · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
94%Service-mix similarityView profile →

Timothy Joseph Devine, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
81%Service-mix similarityView profile →

Daniel Y Li, MD

Cardiovascular Disease · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
79%Service-mix similarityView profile →

Sean Ming-Yuan Wu, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
78%Service-mix similarityView profile →

Kenneth William Mahaffey, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
77%Service-mix similarityView profile →

Sneha Shah Jain, MD, MBA

Cardiovascular Disease · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
73%Service-mix similarityView profile →

Fatima Rodriguez, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
71%Service-mix similarityView profile →

Eleanor Gwen Levin, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
71%Service-mix similarityView profile →

Joshua Michael Spin, MD, PHD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
70%Service-mix similarityView profile →

Matthew Charles Whitlock, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
69%Service-mix similarityView profile →

Joshua Wiley Knowles, MD

Cardiovascular Disease · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
68%Service-mix similarityView 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 NPI 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.