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 Abdullah M N S Alshammari, MD, FRCSC with clinicians in the same registry specialty: Specialty details in registry.

CA · Exact areaEdit location

2024 published service data · 198 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Oluwatomi Lanre-Amos, MD

Orthopedic Surgery (CMS) · Sacramento, CA

Shared published services
1 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
86%Service-mix similarityView profile →

Emily Susanne Mills

Orthopedic Surgery (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
65%Service-mix similarityView profile →

Alexander Richter, M.D.

Orthopedic Surgery (CMS) · Fullerton, CA

Shared published services
1 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
57%Service-mix similarityView profile →

Christopher Dijanic, MD

Orthopedic Surgery (CMS) · La Jolla, CA

Shared published services
1 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
55%Service-mix similarityView profile →

Ruwan Ratnayake, MD

Orthopedic Surgery (CMS) · Sacramento, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
50%Service-mix similarityView profile →

Michael A Kropf, M.D.

Orthopedic Surgery (CMS) · Santa Monica, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
44%Service-mix similarityView profile →

Vinko Zlomislic, MD

Orthopedic Surgery (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
43%Service-mix similarityView profile →

Nitin N Bhatia, MD

Orthopedic Surgery (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
43%Service-mix similarityView profile →

Brian Karamian

Orthopedic Surgery (CMS) · Palo Alto, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
41%Service-mix similarityView profile →

Jamal Shillingford

Orthopedic Surgery (CMS) · Larkspur, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
41%Service-mix similarityView profile →

Christopher Yoon Kong, M.D.

Orthopedic Surgery (CMS) · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
39%Service-mix similarityView profile →

Wayne K Cheng, M.D.

Orthopedic Surgery (CMS) · Loma Linda, CA

Shared published services
2 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Fusion of spine in lower back (22612)
39%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.