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Compare the published Medicare service mix of Vladimir Adriano Cortez, DO with clinicians in the same registry specialty: General Surgery · Neurosurgery (CMS).

CA · Exact areaEdit location

2024 published service data · 470 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Zachary Barnard

Neurosurgery (CMS) · Beverly Hills, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
100%Service-mix similarityView profile →

Nicholas Edward Tarlov, MD

Neurology (CMS) · Ventura, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
99%Service-mix similarityView profile →

Nguyen Trong Do, D.O.

Neurosurgery (CMS) · San Ramon, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
78%Service-mix similarityView profile →

Alan Long, MD

Neurology (CMS) · Fresno, CA

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
77%Service-mix similarityView profile →

Lance Eugene Gravely, MD

Neurosurgery (CMS) · Pasadena, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
76%Service-mix similarityView profile →

Sean S. Armin, M.D.

Neurosurgery (CMS) · Valley Village, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
72%Service-mix similarityView profile →

Brian Robert Hirshman, M.D.

Neurosurgery (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
70%Service-mix similarityView profile →

Michael Alan Sheinberg, M.D.

Neurosurgery (CMS) · Oakland, CA

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%Service-mix similarityView profile →

Aria Fallah, MD, MSC

Neurosurgery (CMS) · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%Service-mix similarityView profile →

Frank Joseph Attenello, M.D., M.S.

Neurosurgery (CMS) · Los Angeles, CA

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%Service-mix similarityView profile →

Soren A Singel, M.D.

Interventional Radiology · Neurosurgery (CMS) · San Jose, CA

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%Service-mix similarityView profile →

Kevin Gerard Waldron, MD

Neurosurgery (CMS) · Laguna Hills, CA

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
64%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.