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Compare the published Medicare service mix of Timothy Leung, M.D. with clinicians in the same registry specialty: Specialty details in registry.

CA · Exact areaEdit location

2024 published service data · 204 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Adam Michael O'toole, M.D.

General Surgery · Plastic And Reconstructive Surgery (CMS) · Pasadena, 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)
72%Service-mix similarityView profile →

Harry Marshak, M.D.

General Surgery · Plastic And Reconstructive Surgery (CMS) · Beverly Hills, 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)
58%Service-mix similarityView profile →

Diya H Tantawi, MD, FACS

General Surgery · Plastic And Reconstructive Surgery (CMS) · Rancho Mirage, 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)
50%Service-mix similarityView profile →

Trung D Nguyen, MD

Plastic And Reconstructive Surgery (CMS) · San Bernardino, 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)
49%Service-mix similarityView profile →

Mehrdad Mark Mofid, M.D.

Plastic And Reconstructive Surgery (CMS) · La Jolla, 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)
45%Service-mix similarityView profile →

John Philip Disaia, MD

Plastic And Reconstructive Surgery (CMS) · Santa Ana, 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)
44%Service-mix similarityView profile →

Keliang Xiao, MD

Plastic And Reconstructive Surgery (CMS) · Modesto, 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)
41%Service-mix similarityView profile →

William E. Starr, M.D.

General Surgery · Otolaryngology · Plastic And Reconstructive Surgery (CMS) · Ventura, 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)
37%Service-mix similarityView profile →

Omar Ahmed, MD

Hand Surgery · Plastic And Reconstructive Surgery (CMS) · Pasadena, 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)
36%Service-mix similarityView profile →

James J Lee, MD

Hand Surgery · Plastic And Reconstructive Surgery (CMS) · Mission Hills, 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)
36%Service-mix similarityView profile →

Joseph Kurt Bivens, M.D.

Plastic And Reconstructive Surgery (CMS) · Brawley, 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)
29%Service-mix similarityView profile →

Jason R Hess, M.D.

Hand Surgery · Plastic And Reconstructive Surgery (CMS) · San Diego, 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)
25%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.