HCPList Know more before you call. About
A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Sung Hwan Chun, MD with clinicians in the same registry specialty: Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) · Internal Medicine (CMS).

STANFORD, CA · Exact areaEdit location

2024 published service data · 12 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Girish Ananth Narayan, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days (93296)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
81%Service-mix similarityView profile →

Rajan Lalit Shah, M.D.

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days (93296)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
68%Service-mix similarityView profile →

Tina Baykaner, MD

Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
66%Service-mix similarityView profile →

Albert Joseph Rogers, MD

Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
63%Service-mix similarityView profile →

Alexander Carroll Perino, MD

Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
61%Service-mix similarityView profile →

Mohan Nallicheri Viswanathan, M.D.

Cardiac Electrophysiology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
57%Service-mix similarityView profile →

Marco Valentin Perez, MD

Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
52%Service-mix similarityView profile →

Sanjiv Narayan, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
52%Service-mix similarityView profile →

Roy Mattathu John, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
51%Service-mix similarityView profile →

Paul Johnson Wang, MD

Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)
  • Evaluation of cardiac rhythm monitor system, remote up to 30 days (93298)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
47%Service-mix similarityView profile →

Nitish Badhwar, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Programming of dual lead pacemaker system (93280)
46%Service-mix similarityView profile →

John Christopher Evans, MD

Cardiac Electrophysiology · Cardiovascular Disease (Cardiology) (CMS) · 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)
  • Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)
  • Evaluation of single, dual, multiple lead or leadless pacemaker system (93288)
25%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.