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Compare the published Medicare service mix of Mark H Christensen, M.D. with clinicians in the same registry specialty: Emergency Medicine.

AL · Exact areaEdit location

2024 published service data · 458 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

David Oman Carney, MD

Emergency Medicine · Union Springs, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
99%Service-mix similarityView profile →

Donald Carlin Tighe, D.O.

Emergency Medicine · Birmingham, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
97%Service-mix similarityView profile →

Jeremy Shawn Pepper, M.D.

Emergency Medicine · Mobile, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
97%Service-mix similarityView profile →

Mark Stephen Griffin, M.D.

Emergency Medicine · Troy, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
96%Service-mix similarityView profile →

Rachel Michelle Giyanani, M.D.

Emergency Medicine · Huntsville, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
96%Service-mix similarityView profile →

Joseph Allen Tubbs, MD

Emergency Medicine · Alabaster, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
91%Service-mix similarityView profile →

Nicholas Machael Vetrano, M.D.

Emergency Medicine · Tuscaloosa, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
91%Service-mix similarityView profile →

Daniel Flavius Pirvan, M.D.

Emergency Medicine · Birmingham, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
91%Service-mix similarityView profile →

Jeffrey Alston Whitener, D.O.

Emergency Medicine · Bay Minette, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
91%Service-mix similarityView profile →

Harold Kim, MD

Emergency Medicine · Birmingham, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
91%Service-mix similarityView profile →

Robert Chase Ruffo, MD

Emergency Medicine · Birmingham, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
91%Service-mix similarityView profile →

Nathaniel Lisenbee, M.D.

Emergency Medicine · Trussville, AL

Shared published services
3 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
91%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.