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Compare the published Medicare service mix of Sam A Ebrahimi, MD with clinicians in the same registry specialty: Thoracic Surgery · Vascular Surgery (CMS).

CA · Exact areaEdit location

2024 published service data · 307 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Reza Khodaverdian, M.D.

Cardiac Surgery · Vascular Surgery (CMS) · Irvine, CA

Shared published services
3 shared services · view billing descriptions
  • Ultrasound study of arm or leg veins with compression and maneuvers (93970)
  • Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance (36475)
  • Injection of chemical agent into single incompetent vein of leg using ultrasound guidance (36465)
70%Service-mix similarityView profile →

Gholam Reza Mohammadzadeh, MD

Thoracic Surgery (CMS) · Thousand Oaks, CA

Shared published services
3 shared services · view billing descriptions
  • Ultrasound study of arm or leg veins with compression and maneuvers (93970)
  • Chemical destruction of first incompetent vein of arm or leg using imaging guidance (36482)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
53%Service-mix similarityView profile →

Mehrdad M.r. Amirhamzeh, M.D.

Cardiac Surgery · General Surgery (CMS) · Manteca, CA

Shared published services
3 shared services · view billing descriptions
  • Ultrasound study of arm or leg veins with compression and maneuvers (93970)
  • Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance (36475)
  • Injection of chemical agent into single incompetent vein of leg using ultrasound guidance (36465)
45%Service-mix similarityView profile →

John B Overton, MD

Specialty details in registry · Stockton, 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
42%Service-mix similarityView profile →

Tom Mahendra, MD

Specialty details in registry · Lancaster, 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
37%Service-mix similarityView profile →

Michael J Mann, MD

General Surgery · Thoracic Surgery (CMS) · San Francisco, 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 similarityView profile →

James P Zalez, MD

Surgical Oncology · Thoracic Surgery (CMS) · Santa Monica, 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 similarityView profile →

John Benjamin Degraft-Johnson, M.D.,

General Surgery · Thoracic Surgery · Vascular Surgery (CMS) · Modesto, 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
34%Service-mix similarityView profile →

Vincent A Gaudiani, MD

Thoracic Surgery (CMS) · Palo Alto, CA

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
33%Service-mix similarityView profile →

Harold A Tabaie, MD

General Surgery · Thoracic Surgery · Vascular Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Ultrasound study of arm or leg veins with compression and maneuvers (93970)
  • Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance (36475)
  • Injection of chemical agent into single incompetent vein of leg using ultrasound guidance (36465)
33%Service-mix similarityView profile →

Joseph H Chammas, M.D.

Cardiovascular Disease (Cardiology) · Thoracic Surgery (CMS) · San Diego, 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
32%Service-mix similarityView profile →

Miguel Puig Palomar, MD

Thoracic Surgery (CMS) · Chico, 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
31%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.