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Compare the published Medicare service mix of Christopher D Roark, M.D. with clinicians in the same registry specialty: Neurosurgery (CMS).

AURORA, CO · Exact areaEdit location

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

Joshua Seinfeld, MD

Interventional Radiology · Neurosurgery (CMS) · Aurora, CO

Shared published services
2 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist (36224)
59%Service-mix similarityView profile →

David Edward Case, MD

Neurosurgery · Vascular Surgery (CMS) · Aurora, CO

Shared published services
2 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist (36224)
54%Service-mix similarityView profile →

Daniel Craig, M.D.

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
26%Service-mix similarityView profile →

Zach Andrew Folzenlogen, MD

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
22%Service-mix similarityView profile →

Peter J Lennarson, MD

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
20%Service-mix similarityView profile →

Yasuaki Harasaki, MD

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
18%Service-mix similarityView profile →

Vadim Tsvankin, MD

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
18%Service-mix similarityView profile →

John Berry Candelario, MD, MPH

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
17%Service-mix similarityView profile →

Robert Breeze, MD

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
17%Service-mix similarityView profile →

Colin C. Buchanan, M.D.

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
16%Service-mix similarityView profile →

Tareq Mustafa Yaseen

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
15%Service-mix similarityView profile →

Timothy Ung, M.D.

Neurosurgery (CMS) · Aurora, CO

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
15%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.