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Compare the published Medicare service mix of Stefan Ruehm, MD with clinicians in the same registry specialty: Internal Medicine.

LOS ANGELES, CA · Exact areaEdit location

2024 published service data · 500 eligible profiles compared. This search reached its 500-profile comparison limit, using NPI order. Narrow the location for a more focused comparison. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Michael Lepera, DMD MD

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Ultrasound study of arm and leg arteries (93922)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
40%Service-mix similarityView profile →

Eric Ronald Sue, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • X-ray of chest, 2 views (71046)
  • Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)
34%Service-mix similarityView profile →

James Jung, MD

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • X-ray of chest, 2 views (71046)
  • Ct scan of chest without contrast (71250)
33%Service-mix similarityView profile →

Takeshi Matsumoto, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services for two or more chronic conditions, first 30 minutes provided personally by health care professional, per calendar month (99491)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
32%Service-mix similarityView profile →

Enoch Arhinful, MD

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
32%Service-mix similarityView profile →

Douglas A Webber, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services for two or more chronic conditions, first 30 minutes provided personally by health care professional, per calendar month (99491)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Advance care planning, first 30 minutes (99497)
29%Service-mix similarityView profile →

Eleonora Fedonenko, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Advance care planning, first 30 minutes (99497)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
26%Service-mix similarityView profile →

Imanuel Khalili, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services for two or more chronic conditions, first 30 minutes provided personally by health care professional, per calendar month (99491)
  • Evaluation of psychological test, first hour (96130)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
26%Service-mix similarityView profile →

David Vizel, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Advance care planning, first 30 minutes (99497)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
26%Service-mix similarityView profile →

Young-Jik Lee, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Advance care planning, first 30 minutes (99497)
  • Ultrasound scan of abdominal aorta (76706)
26%Service-mix similarityView profile →

Andrew Michael Feda, MD

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Insertion of needle into vein for collection of blood sample (36415)
25%Service-mix similarityView profile →

Stephanie C. Koven, M.D.

Internal Medicine · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • X-ray of chest, 2 views (71046)
  • Insertion of needle into vein for collection of blood sample (36415)
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.