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Compare the published Medicare service mix of Siamak Barkhordarian, M.D. with clinicians in the same registry specialty: Diagnostic Radiology · General Surgery · Interventional Radiology · Peripheral Vascular Disease · Vascular Surgery (CMS).

LOS ANGELES, CA · Exact areaEdit location

2024 published service data · 35 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Miguel Francisco Manzur, M.D.

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

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Review by radiologist of arm or leg artery image (75710)
35%Service-mix similarityView profile →

Spencer Leland Brown, M.D.

General Surgery · Vascular Surgery (CMS) · Los Angeles, 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)
  • Ultrasonic guidance for blood vessel access (76937)
  • Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist (36902)
35%Service-mix similarityView profile →

Johnathon Curtis Rollo, MD

Vascular Surgery (CMS) · Los Angeles, 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)
  • Ultrasonic guidance for blood vessel access (76937)
  • Review by radiologist of arm or leg artery image (75710)
33%Service-mix similarityView profile →

Allan W. Tulloch, M.D.

Vascular Surgery (CMS) · Los Angeles, 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)
  • Ultrasonic guidance for blood vessel access (76937)
  • Review by radiologist of arm or leg artery image (75710)
33%Service-mix similarityView profile →

Wesley S Moore, MD

Vascular Surgery (CMS) · Los Angeles, 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)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
32%Service-mix similarityView profile →

Neil P Reddy

Vascular Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasonic guidance for blood vessel access (76937)
31%Service-mix similarityView profile →

Vincent Lopez Rowe, MD

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

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
30%Service-mix similarityView profile →

Sally A Schonefeld, M.D.

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

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
29%Service-mix similarityView profile →

Elizabeth L Chou, MD

Vascular Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Review by radiologist of arm or leg artery image (75710)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
29%Service-mix similarityView profile →

Christian Jesus Ochoa, MD

General Surgery · Vascular Surgery (CMS) · Los Angeles, 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)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Review by radiologist of abdominal aorta image (75625)
28%Service-mix similarityView profile →

William Ming Lee, M.D.

General Surgery · Vascular Surgery (CMS) · Los Angeles, 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)
  • Review by radiologist of arm or leg artery image (75710)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
27%Service-mix similarityView profile →

Kenneth Richard Ziegler, M.D.

Vascular Surgery (CMS) · Los Angeles, 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)
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.