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Compare the published Medicare service mix of Julie A Margenthaler, MD with clinicians in the same registry specialty: General Surgery · Surgical Oncology (CMS).

SAINT LOUIS, MO · Exact areaEdit location

2024 published service data · 11 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Patricia Ann Limpert, MD

Surgical Oncology (CMS) · Saint Louis, MO

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 a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Imaging of lymph nodes during surgery (38900)
77%Service-mix similarityView profile →

Ryan Courtney Fields, MD

Surgical Oncology (CMS) · Saint Louis, MO

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 a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Imaging of lymph nodes during surgery (38900)
70%Service-mix similarityView profile →

Rebecca L Aft, MD

General Surgery · Surgical Oncology (CMS) · Saint Louis, MO

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)
  • Imaging of lymph nodes during surgery (38900)
  • Biopsy or removal of deep lymph nodes of underarm (38525)
68%Service-mix similarityView profile →

Peter Joseph Dipasco, MD

Surgical Oncology (CMS) · Saint Louis, MO

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 a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
59%Service-mix similarityView profile →

Ashton Jean Brooks, MD

Surgical Oncology (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Imaging of lymph nodes during surgery (38900)
  • Biopsy or removal of deep lymph nodes of underarm (38525)
47%Service-mix similarityView profile →

Timothy Joseph Vreeland, M.D.

General Surgery · Surgical Oncology (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
46%Service-mix similarityView profile →

Taylor Brown, MD

General Surgery · Surgical Oncology (CMS) · Saint Louis, MO

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 a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
44%Service-mix similarityView profile →

Jennifer Keller, M.D.

Surgical Oncology (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
35%Service-mix similarityView profile →

Ashley Janelle Wilbers, MD

Surgical Oncology (CMS) · Saint Louis, MO

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)
31%Service-mix similarityView profile →

William E Gillanders, MD

General Surgery · Surgical Oncology (CMS) · Saint Louis, MO

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)
22%Service-mix similarityView profile →

Trang Kim Nguyen, MD

Surgical Oncology (CMS) · Saint Louis, MO

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)
21%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.