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Compare the published Medicare service mix of Ross D. Simafranca, M.D. with clinicians in the same registry specialty: Surgery.

EWA BEACH, HI · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 10 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Junji Bernard Machi, M.D.

Surgery · Honolulu, HI

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
74%Service-mix similarity~9.6 milesView profile →

Mark Wayne Grief, M.D.

Surgery · Aiea, HI

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
69%Service-mix similarity~6.6 milesView profile →

Carl Joseph Tadaki, M.D.

Surgery · Honolulu, HI

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
55%Service-mix similarity~9.6 milesView profile →

Fredrick Lewis Yost, M.D.

Surgery · Honolulu, HI

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
52%Service-mix similarity~9.6 milesView profile →

Manami Okado, M.D.

Surgery · Honolulu, HI

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
52%Service-mix similarity~9.6 milesView profile →

Andrew Jun Oishi, M.D.

Surgery · Honolulu, HI

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
52%Service-mix similarity~9.6 milesView profile →

Ashley Davidson Marumoto

Surgery · Honolulu, HI

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
41%Service-mix similarity~9.6 milesView profile →

Steven Francis Fowler, M.D.

Surgery · Honolulu, HI

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
38%Service-mix similarity~9.6 milesView profile →

Kurt Daniel Edwards, M.D.

Surgery · Tripler Amc, HI

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
19%Service-mix similarity~6.3 milesView 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 approximate distance 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.