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Compare the published Medicare service mix of Elaine Worcester with clinicians in the same registry specialty: Internal Medicine · Nephrology (CMS).

CHICAGO, IL · Exact areaEdit location

2024 published service data · 127 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Michael J. Fischer

Internal Medicine · Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
81%Service-mix similarityView profile →

Xunrong Luo, M.D.

Nephrology (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 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
72%Service-mix similarityView profile →

Patrick Elie Hallak, M.D

Specialty details in registry · 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 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
71%Service-mix similarityView profile →

Aleksandra Gmurczyk, MD

Specialty details in registry · 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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
70%Service-mix similarityView profile →

Ivan S. Begov, MD

Internal Medicine · Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
69%Service-mix similarityView profile →

Rupal C Mehta, M.D

Internal Medicine · Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
69%Service-mix similarityView profile →

William Whittier, MD

Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
67%Service-mix similarityView profile →

Louis George Baeseman, MD

Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
65%Service-mix similarityView profile →

Bartlomiej Maciej Calka, D.O.

Internal Medicine · Nephrology (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 50 minutes (99233)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%Service-mix similarityView profile →

Song Liu, M.D.

Internal Medicine · Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
64%Service-mix similarityView profile →

Pravir Baxi, M.D.

Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
64%Service-mix similarityView profile →

Roger Rodby, MD

Nephrology (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 50 minutes (99233)
  • Hemodialysis procedure with physician evaluation (90935)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
62%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.