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Compare the published Medicare service mix of Felicitas Koller, MD with clinicians in the same registry specialty: General Surgery (CMS).

CHICAGO, IL · Exact areaEdit location

2024 published service data · 23 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Edward F Hollinger, M.D., PH.D.

General Surgery (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • 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)
71%Service-mix similarityView profile →

Nathalie Sela, MD

General Surgery (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
67%Service-mix similarityView profile →

Oyedolamu Olaitan, MBBS, FACS, FEBS

General Surgery (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • 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)
66%Service-mix similarityView profile →

Pierpaolo Di Cocco, MD

General Surgery (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
55%Service-mix similarityView profile →

Satish Narayana Swamy Nadig, M.D., PH.D.

General Surgery · Pediatric Medicine (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Preparation of donor kidney for transplantation (50323)
54%Service-mix similarityView profile →

Juan Carlos Caicedo Ramirez, MD

General Surgery · Pediatric Medicine (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Preparation of donor kidney for transplantation (50323)
49%Service-mix similarityView profile →

Stephen Jensik, M.D.

General Surgery (CMS) · Chicago, IL

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)
  • Creation of artery-vein connection using tube graft for hemodialysis (36830)
  • Relocation of arm vein with connection to arm artery for hemodialysis (36821)
48%Service-mix similarityView profile →

Zachary Dietch

General Surgery (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Preparation of donor kidney for transplantation (50323)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
46%Service-mix similarityView profile →

Piotr Witkowski

General Surgery (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Preparation of donor kidney for transplantation (50323)
44%Service-mix similarityView profile →

Arielle Cimeno, MD

General Surgery (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Preparation of donor kidney for transplantation (50323)
44%Service-mix similarityView profile →

Rosario A Perez Gutierrez

General Surgery (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Preparation of donor kidney for transplantation (50323)
43%Service-mix similarityView profile →

Daniela Ladner, MD

General Practice (CMS) · Chicago, IL

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
40%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.