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Compare the published Medicare service mix of Willis Chang, M.D. with clinicians in the same registry specialty: Infectious Disease · Internal Medicine (CMS).

HI · Exact areaEdit location

2024 published service data · 20 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Royden S Young, M.D.

Infectious Disease (CMS) · Honolulu, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
79%Service-mix similarityView profile →

Jani Mijin Kim

Infectious Disease (CMS) · Honolulu, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
76%Service-mix similarityView profile →

Russell Wong, M.D.

Internal Medicine (CMS) · Honolulu, HI

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

Devin Lee, MD

Infectious Disease (CMS) · Wailuku, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
70%Service-mix similarityView profile →

John Raymond Uy Go, M.D.

Infectious Disease · Internal Medicine (CMS) · Honolulu, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
70%Service-mix similarityView profile →

Lorrance Lewis Majewski, D.O.

Infectious Disease (CMS) · Honolulu, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%Service-mix similarityView profile →

Benjamin Stuart Thomas, MD, MSCI

Infectious Disease · Internal Medicine (CMS) · Honolulu, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%Service-mix similarityView profile →

Heath H Chung, M.D.

Infectious Disease · Internal Medicine (CMS) · Honolulu, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
61%Service-mix similarityView profile →

Joseph K. Koo, M.D.

Specialty details in registry · Honolulu, HI

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)
54%Service-mix similarityView profile →

James Robert Williams, MD

Infectious Disease (CMS) · Wailuku, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
53%Service-mix similarityView profile →

Francis D Pien, M.D.

Infectious Disease · Internal Medicine (CMS) · Honolulu, HI

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)
52%Service-mix similarityView profile →

Clayton Lee Foster, MD

Infectious Disease · Internal Medicine (CMS) · Kailua Kona, HI

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
50%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.