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

LITTLETON, CO · Exact areaEdit location

2024 published service data · 5 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Abhijeet Gummadavelli, MD

Neurosurgery (CMS) · Littleton, CO

Shared published services
3 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)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Critical care, first 30-74 minutes (99291)
62%Service-mix similarityView profile →

Jason E Mcgowan, M.D.

Neurosurgery (CMS) · Littleton, CO

Shared published services
3 shared services · view billing descriptions
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
  • Fusion of additional segment of spine (22614)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
53%Service-mix similarityView profile →

John Adair Prall, M.D.

Neurosurgery (CMS) · Littleton, CO

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
  • Fusion of additional segment of spine (22614)
47%Service-mix similarityView profile →

Angela Bohnen, MD

Neurosurgery (CMS) · Littleton, CO

Shared published services
3 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)
  • Fusion of additional segment of spine (22614)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
40%Service-mix similarityView profile →

David P. Vansickle, M.D.

Neurosurgery (CMS) · Littleton, CO

Shared published services
1 shared services · view billing descriptions
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
18%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.