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Compare the published Medicare service mix of Jiwu Sun, MD with clinicians in the same registry specialty: Internal Medicine (CMS).

MOUNTAIN VIEW, CA · Exact areaEdit location

2024 published service data · 32 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Diana Tsai, MD

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
89%Service-mix similarityView profile →

Keith Andrew Posley, MD

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
89%Service-mix similarityView profile →

Grant David Hochstein, M.D.

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
89%Service-mix similarityView profile →

Ryan M Collins, M.D.

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
86%Service-mix similarityView profile →

Randy Liang, D.O.

Internal Medicine (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
85%Service-mix similarityView profile →

Mahsa Esfahani, MD

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
84%Service-mix similarityView profile →

George Sydney Lau, M.D.

Hospitalist · Internal Medicine (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
84%Service-mix similarityView profile →

Tina Thien Nhan, D.O.

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
82%Service-mix similarityView profile →

Jessica Heejin Yoo, MD

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
82%Service-mix similarityView profile →

Tho Lynn Ngo, MD

Hospitalist · Internal Medicine (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
82%Service-mix similarityView profile →

Benjamin Chang, MD

Hospitalist · Internal Medicine (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
82%Service-mix similarityView profile →

David Alan Reinert, D.O.

Hospitalist (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, more than 30 minutes (99239)
81%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.