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Compare the published Medicare service mix of David Zander, M.D. with clinicians in the same registry specialty: Hospitalist · Internal Medicine (CMS).

SAN CLEMENTE, CA · 25 milesEdit location
Within 25 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 · 72 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Adrian Campo, MD

Internal Medicine (CMS) · Murrieta, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Hospital discharge day management, more than 30 minutes (99239)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
63%Service-mix similarity~21.9 milesView profile →

Humberto Sauri, MD

General Surgery (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Critical care, first 30-74 minutes (99291)
59%Service-mix similarity~23.3 milesView profile →

Kenneth Robert Lynn, M.D.

Physical Medicine And Rehabilitation (CMS) · Laguna Hills, CA

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
50%Service-mix similarity~10.9 milesView profile →

William F Davis, MD

General Surgery (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Critical care, first 30-74 minutes (99291)
48%Service-mix similarity~23.3 milesView profile →

Amer Zarka, M.D.

Cardiovascular Disease (Cardiology) · Internal Medicine (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Critical care, first 30-74 minutes (99291)
40%Service-mix similarity~22.9 milesView profile →

Mahmoud Eslami Farsani, MD

Cardiovascular Disease (Cardiology) (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
19%Service-mix similarity~23.3 milesView profile →

Stephen Cohen, M.D.

Specialty details in registry · Santa Ana, CA

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
17%Service-mix similarity~23.3 milesView profile →

Robert Brown, D.O.

Specialty details in registry · Murrieta, CA

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
17%Service-mix similarity~21.9 milesView profile →

Michael Garcia, M.D.

Emergency Medicine (CMS) · Murrieta, CA

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
16%Service-mix similarity~21.9 milesView profile →

Neyssan Tebyani, M.D.

Urology (CMS) · Laguna Hills, CA

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
14%Service-mix similarity~10.9 milesView profile →

Gregory Joseph Ardigo, M.D.

Gastroenterology (CMS) · Murrieta, CA

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
14%Service-mix similarity~21.9 milesView profile →

Raymond Hale Folmar, M.D.

Orthopedic Surgery (CMS) · Irvine, CA

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
14%Service-mix similarity~15.6 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.