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Compare the published Medicare service mix of Robert Woodworth Shaffer, MD with clinicians in the same registry specialty: Emergency Medicine.

ANN ARBOR, MI · Exact areaEdit location

2024 published service data · 157 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Ginette Vachon Busschots, MD

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
95%Service-mix similarityView profile →

Eduardo Jorge Navarrete, M.D.

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
95%Service-mix similarityView profile →

Matthew Livingston Watson, M.D.

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
94%Service-mix similarityView profile →

Mohammad Khan, MD

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
94%Service-mix similarityView profile →

Elizabeth Gibbons Davis, MD

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
94%Service-mix similarityView profile →

Stephen Paul Heirendt, D.O.

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
94%Service-mix similarityView profile →

Antony Po-Yu Hsu, M.D.

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
94%Service-mix similarityView profile →

Phillip Alton Scott, MD

Emergency Medicine · Ann Arbor, MI

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)
  • Ultrasound of heart, follow-up (93308)
93%Service-mix similarityView profile →

Adam Izzat Kadri, MD

Emergency Medicine · Ann Arbor, MI

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)
  • Emergency department visit with low level of medical decision making (99283)
93%Service-mix similarityView profile →

Benjamin Scott Bassin, MD

Emergency Medicine · Ann Arbor, MI

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)
  • Ultrasound of heart, follow-up (93308)
93%Service-mix similarityView profile →

Christopher Mon-Chee Fung, M.D.

Emergency Medicine · Ann Arbor, MI

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)
  • Ultrasound of heart, follow-up (93308)
93%Service-mix similarityView profile →

Nikhil Rajendran Theyyunni, MD

Emergency Medicine · Ann Arbor, MI

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)
  • Ultrasound of heart, follow-up (93308)
92%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.