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Compare the published Medicare service mix of Viktor Gabriel, M.D. with clinicians in the same registry specialty: Surgery.

LONG BEACH, CA · Exact areaEdit location

2024 published service data · 11 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

James Michael Tatum, M.D.

Surgery · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
63%Service-mix similarityView profile →

Ronald Frank Wolf, M.D.

Surgery · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
48%Service-mix similarityView profile →

Jeffrey Tanaka Islas, MD

Surgery · Long Beach, 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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
42%Service-mix similarityView profile →

Jeffrey Eugene Quigley, D.O.

Surgery · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
41%Service-mix similarityView profile →

Viken Razmig Konyalian, MD

Surgery · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of gallbladder using an endoscope (47562)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
40%Service-mix similarityView profile →

Tchaka Bayete Shepherd, MD

Surgery · Long Beach, CA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
39%Service-mix similarityView profile →

Malgorzata V Stanczyk, M.D.

Surgery · Long Beach, CA

Shared published services
1 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)
33%Service-mix similarityView profile →

James A. Murray, MD

Surgery · Long Beach, CA

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
32%Service-mix similarityView profile →

Nolan Stephen Desa, MD

Surgery · Long Beach, CA

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
20%Service-mix similarityView profile →

Ayman Neoman, M.D.,

Surgery · Long Beach, CA

Shared published services
1 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)
17%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.