A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of John Karl Frederiksen, M.D., PH.D. with clinicians in the same registry specialty: Pathology (CMS).

CHICAGO, IL · Exact areaEdit location

2024 published service data · 120 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Hamza Tariq, M.D

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Hemoglobin analysis and measurement, electrophoresis (83020)
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
80%Service-mix similarityView profile →

Carlos A Murga-Zamalloa, M.D.

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Hemoglobin analysis and measurement, electrophoresis (83020)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Flow cytometry technique for dna or cell analysis, 9 to 15 markers (88188)
78%Service-mix similarityView profile →

Yi Hua Chen, MD

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Flow cytometry technique for dna or cell analysis, 9 to 15 markers (88188)
77%Service-mix similarityView profile →

Kristy Lucile Wolniak, M.D., PH.D.

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Flow cytometry technique for dna or cell analysis, 9 to 15 markers (88188)
76%Service-mix similarityView profile →

Qing Chen, MD, PHD

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Flow cytometry technique for dna or cell analysis, 9 to 15 markers (88188)
74%Service-mix similarityView profile →

Juehua Gao, M.D.

Hematology · Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Flow cytometry technique for dna or cell analysis, 9 to 15 markers (88188)
72%Service-mix similarityView profile →

Waihay Wong, M.D. PH.D.

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Flow cytometry technique for dna or cell analysis, 9 to 15 markers (88188)
71%Service-mix similarityView profile →

Shaun Webb, DO

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Blood smear interpretation by physician with written report (85060)
68%Service-mix similarityView profile →

Daniel Arber

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Flow cytometry technique for dna or cell analysis, 9 to 15 markers (88188)
  • Bone marrow, smear interpretation (85097)
67%Service-mix similarityView profile →

Robert P Decresce, MD

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Hemoglobin analysis and measurement, electrophoresis (83020)
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
66%Service-mix similarityView profile →

Tripti Kumar

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Blood smear interpretation by physician with written report (85060)
66%Service-mix similarityView profile →

Faiza Siddiqui, MD

Pathology (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
  • Blood smear interpretation by physician with written report (85060)
66%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.