Maria D Del Valle Estopinal, MD
Pathology (CMS) · Orange, CA
Shared published services3 shared services · view billing descriptions
95%Service-mix similarity~6.4 milesView profile →
Similar work.
More providers to explore.
Compare the published Medicare service mix of Andy Chia-Wei Hsi, M.D. with clinicians in the same registry specialty: Dermatology · Pathology (CMS).
PLACENTIA, CA · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance
Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works
2024 published service data · 33 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.
Bijan Haghighi, M.D.
Specialty details in registry · Orange, CA
Shared published services3 shared services · view billing descriptions
91%Service-mix similarity~6.4 milesView profile →
Gholamhossei Pezeshkpour, MD
Pathology (CMS) · Santa Ana, CA
Shared published services3 shared services · view billing descriptions
86%Service-mix similarity~9.3 milesView profile →
Vishal S Chandan, MD
Pathology (CMS) · Orange, CA
Shared published services3 shared services · view billing descriptions
85%Service-mix similarity~6.4 milesView profile →
Saman Karimi, MD, MS
Pathology (CMS) · Orange, CA
Shared published services3 shared services · view billing descriptions
84%Service-mix similarity~6.4 milesView profile →
Steven Jo Ken Lum, M.D.
Pathology (CMS) · Anaheim, CA
Shared published services3 shared services · view billing descriptions
82%Service-mix similarity~6.2 milesView profile →
Ali Afsari, M.D.
Pathology (CMS) · Orange, CA
Shared published services3 shared services · view billing descriptions
81%Service-mix similarity~6.4 milesView profile →
Terry M Welsh, MD
Pathology (CMS) · Anaheim, CA
Shared published services3 shared services · view billing descriptions
79%Service-mix similarity~6.2 milesView profile →
Sejal S Shah, MD
Pathology (CMS) · Orange, CA
Shared published services3 shared services · view billing descriptions
79%Service-mix similarity~6.4 milesView profile →
Si Van Nguyen, M.D.
Pathology (CMS) · Garden Grove, CA
Shared published services3 shared services · view billing descriptions
79%Service-mix similarity~8.8 milesView profile →
Robert Schmidt, M.D.
Pathology (CMS) · Anaheim, CA
Shared published services3 shared services · view billing descriptions
78%Service-mix similarity~7.9 milesView profile →
Rooba Wardeh, M.D
Internal Medicine · Pathology (CMS) · Orange, CA
Shared published services3 shared services · view billing descriptions
78%Service-mix similarity~6.4 milesView 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 approximate distance 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.