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Compare the published Medicare service mix of David P Pham, D.O with clinicians in the same registry specialty: Emergency Medicine.

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

Thuy Thi-Minh Nguyen, MD

Emergency Medicine · Rancho Cucamonga, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
77%Service-mix similarity~17.7 milesView profile →

Ashley Advincula, MD

Emergency Medicine · Trabuco Canyon, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Automated urinalysis test (81003)
63%Service-mix similarity~13.3 milesView profile →

Peter C. Czuleger, M.D.

Emergency Medicine · Mission Viejo, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
60%Service-mix similarity~17.7 milesView profile →

Teri L. Yoshitake, M.D.

Emergency Medicine · Claremont, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
58%Service-mix similarity~20.1 milesView profile →

Ayad Said Makar, M.D.

Emergency Medicine · Rialto, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
57%Service-mix similarity~20.6 milesView profile →

Yi Zhang, M.D.

Emergency Medicine · Rancho Cucamonga, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
56%Service-mix similarity~20.3 milesView profile →

Eric Kent Frykman, M.D.

Emergency Medicine · Riverside, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
54%Service-mix similarity~12.0 milesView profile →

Larisa Zeltser, D.O.

Emergency Medicine · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Automated urinalysis test (81003)
54%Service-mix similarity~15.3 milesView profile →

Elizabeth A Mitchell, M.D.

Emergency Medicine · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
49%Service-mix similarity~19.1 milesView profile →

Michael Cao

Emergency Medicine · Chino, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
49%Service-mix similarity~13.3 milesView profile →

Piyush R Viradia, MD

Emergency Medicine · Riverside, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Blood count, hemoglobin (85018)
48%Service-mix similarity~15.0 milesView profile →

Liezl Avila, D.O.

Emergency Medicine · Upland, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Injection of drug or substance under skin or into muscle (96372)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
47%Service-mix similarity~19.0 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.