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Compare the published Medicare service mix of Chang-Hwa Mary Chen, M.D. with clinicians in the same registry specialty: Anesthesiology.

DUARTE, CA · Exact areaEdit location

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

Michael Sullivan, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
51%Service-mix similarityView profile →

Walter Chang, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
50%Service-mix similarityView profile →

Parin Garg, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for extensive surgery on spine (00670)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
50%Service-mix similarityView profile →

Russell Gray, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
46%Service-mix similarityView profile →

Sarkis Baltayian, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
45%Service-mix similarityView profile →

Michael Lew, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
44%Service-mix similarityView profile →

Evelyn Janet Bonilla, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
43%Service-mix similarityView profile →

Sarah Kwon Yip, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
43%Service-mix similarityView profile →

Sanaz Ghaffari, M.D.

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
37%Service-mix similarityView profile →

Ana Chu, MD

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
35%Service-mix similarityView profile →

John Louis Raytis, M.D.

Anesthesiology · Duarte, CA

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for other procedure on upper abdomen (00790)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
33%Service-mix similarityView profile →

Yung Ray Jow, M.D.

Anesthesiology · Duarte, CA

Shared published services
1 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
29%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.