A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Constance Chen, MD with clinicians in the same registry specialty: Pathology (CMS).

SAN FRANCISCO, CA · Exact areaEdit location

2024 published service data · 41 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Hannah Lee, DO

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
95%Service-mix similarityView profile →

Frederick L. Baehner, MD

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
92%Service-mix similarityView profile →

Ronald Balassanian, MD

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
87%Service-mix similarityView profile →

Dianna Ng, MD

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
80%Service-mix similarityView profile →

Georgios Deftereos, M.D.

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
75%Service-mix similarityView profile →

Anastasiya Pigal, M.D.

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
70%Service-mix similarityView profile →

Michael Deftos, M.D.,PH.D.

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
67%Service-mix similarityView profile →

Poonam Vohra

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
65%Service-mix similarityView profile →

Shannon Mulholland, MD

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
64%Service-mix similarityView profile →

Kent Truong, MD

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Pathology examination of tissue using a microscope, intermediate complexity (88305)
61%Service-mix similarityView profile →

Rebecca Spies, M.D.

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
59%Service-mix similarityView profile →

Ruth Zhang

Pathology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Special stained specimen slides to examine tissue, each additional procedure (88341)
  • Cell examination of specimen, selective cellular enhancement technique (88112)
  • Evaluation of fine needle aspirate with interpretation and report (88173)
57%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.