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Compare the published Medicare service mix of Ashwin Gurijala Ramayya, MD, PHD with clinicians in the same registry specialty: Neurology · Neurosurgery (CMS).

STANFORD, CA · Exact areaEdit location

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

Steven Daniel Chang, MD

Neurosurgery (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
40%Service-mix similarityView profile →

Melanie Gail Hayden Gephart, MD

Neurosurgery (CMS) · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
38%Service-mix similarityView profile →

Robert Louis Dodd, MD, PHD

Neurosurgery (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
37%Service-mix similarityView profile →

John Kevin Ratliff, MD

Neurosurgery (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
35%Service-mix similarityView profile →

Stephen In-Sun Ryu, MD

Neurosurgery (CMS) · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
32%Service-mix similarityView profile →

Jongsoo Park, MD

Neurosurgery (CMS) · Stanford, CA

Shared published services
2 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
32%Service-mix similarityView profile →

Karam Paul Asmaro, M.D.

Neurosurgery (CMS) · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
20%Service-mix similarityView profile →

Lawrence Mendel Shuer, MD

Critical Care (Intensivists) · Neurosurgery (CMS) · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
19%Service-mix similarityView profile →

Gordon Ho-Wan Li, MD

Neurosurgery (CMS) · Stanford, CA

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
16%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.