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Compare the published Medicare service mix of Brett Hapeman, DO with clinicians in the same registry specialty: Emergency Medicine.

OLYMPIA FIELDS, IL · Exact areaEdit location

2024 published service data · 47 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

William Joseph Beeler, M.D.

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
100%Service-mix similarityView profile →

Christine Anne Patte, D.O.

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
99%Service-mix similarityView profile →

Jay C Symowicz, D.O.

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
99%Service-mix similarityView profile →

Cody Krueger

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
99%Service-mix similarityView profile →

Carl Leonhardt, DO

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
99%Service-mix similarityView profile →

Erin Rigert

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
98%Service-mix similarityView profile →

Lisa Mussman

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
97%Service-mix similarityView profile →

Peter Savvides, D.O.

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
96%Service-mix similarityView profile →

Bartosz Piotr Leszczynski, D.O.

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
95%Service-mix similarityView profile →

Qi Charles Zhang, M.D.

Emergency Medicine · Olympia Fields, IL

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
  • Critical care, first 30-74 minutes (99291)
94%Service-mix similarityView profile →

Christopher Markus Colbert, DO

Emergency Medicine · Olympia Fields, IL

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
93%Service-mix similarityView profile →

Laura L Musyoka, DO

Emergency Medicine · Olympia Fields, IL

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
93%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.