A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Josiah Aaron Valk, DO with clinicians in the same registry specialty: Orthopedic Surgery.

SAN DIEGO, CA · Exact areaEdit location

2024 published service data · 72 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Bryan Terry Leek, MD

Orthopedic Surgery · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Prosthetic repair of shoulder joint, total shoulder (23472)
  • Repair of shoulder rotator cuff using an endoscope (29827)
39%Service-mix similarityView profile →

Ralph Erik Rynning, M.D.

Orthopedic Surgery · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Prosthetic repair of shoulder joint, total shoulder (23472)
  • Repair of shoulder rotator cuff using an endoscope (29827)
33%Service-mix similarityView profile →

Christopher Edward Urband, MD

Orthopedic Surgery · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • Prosthetic repair of shoulder joint, total shoulder (23472)
18%Service-mix similarityView profile →

Daniel Stuart Brereton, D.O.

Orthopedic Surgery · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • Prosthetic repair of shoulder joint, total shoulder (23472)
17%Service-mix similarityView profile →

Walter Alain Thomas, MD

Orthopedic Surgery · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • Repair of shoulder rotator cuff using an endoscope (29827)
11%Service-mix similarityView profile →

Mark Schultzel, MD

Orthopedic Surgery · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • Repair of shoulder rotator cuff using an endoscope (29827)
9%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.