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 Emery L Chen, M.D. with clinicians in the same registry specialty: Surgery.

CA · Exact areaEdit location

2024 published service data · 500 eligible profiles compared. This search reached its 500-profile comparison limit, using NPI order. Narrow the location for a more focused comparison. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Nathan S Chung, MD

Surgery · Apple Valley, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, each additional 20.0 sq cm or less (11045)
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
73%Service-mix similarityView profile →

Donato Joseph Stinghen, MD

Surgery · San Leandro, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, each additional 20.0 sq cm or less (11045)
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
69%Service-mix similarityView profile →

Peter Vincent Leoni, M.D.

Surgery · Petaluma, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • 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)
67%Service-mix similarityView profile →

Denis Robert Westphal, M.D.

Surgery · Chico, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, each additional 20.0 sq cm or less (11045)
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
65%Service-mix similarityView profile →

Leonard Caputo, M.D.

Surgery · Salinas, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • 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)
64%Service-mix similarityView profile →

Felix Roa Gaw, M.D.

Surgery · Anaheim, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Management of oxygen chamber therapy (99183)
63%Service-mix similarityView profile →

Lisa Elaine Brand, M.D.

Surgery · Camarillo, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • 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)
60%Service-mix similarityView profile →

Stephen James Hopkins, MD

Surgery · Sonora, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, each additional 20.0 sq cm or less (11045)
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
57%Service-mix similarityView profile →

Brian Waddle, M.D.

Surgery · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, each additional 20.0 sq cm or less (11045)
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
56%Service-mix similarityView profile →

Jeremy Schweitzer, M.D.

Surgery · Ventura, 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
55%Service-mix similarityView profile →

Vivian Le-Tran, D.O.

Surgery · Dublin, 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
55%Service-mix similarityView profile →

Hamid R. Rassai

Surgery · Antioch, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of skin and tissue, 20.0 sq cm or less (11042)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Management of oxygen chamber therapy (99183)
54%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.