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

LA MESA, CA · Exact areaEdit location

2024 published service data · 24 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Eric Einstein, MD

Emergency Medicine · La Mesa, 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)
  • Detection test by immunoassay with direct visual observation for influenza virus (87804)
56%Service-mix similarityView profile →

William E Strukel, MD

Emergency Medicine · La Mesa, 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)
  • Emergency department visit with high level of medical decision making (99285)
39%Service-mix similarityView profile →

Brent A Butcher, MD

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
19%Service-mix similarityView profile →

Yenisleidy Paez Perez, DO

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
19%Service-mix similarityView profile →

Joshua Kamnetz

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
18%Service-mix similarityView profile →

Bret Winners

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
18%Service-mix similarityView profile →

Blake Lopez, MD

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
17%Service-mix similarityView profile →

Tania Portillo, MD

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
17%Service-mix similarityView profile →

Christa Ann Landowska Arefieva, MD

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
17%Service-mix similarityView profile →

Kevin M. Kelly

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
17%Service-mix similarityView profile →

Jolene Miller, D.O.

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
16%Service-mix similarityView profile →

Brook Darrett Beall, MD

Emergency Medicine · La Mesa, CA

Shared published services
1 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
16%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.