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Compare the published Medicare service mix of Brian Vala Nahed, MD with clinicians in the same registry specialty: Neurosurgery (CMS).

BOSTON, MA · Exact areaEdit location

2024 published service data · 66 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Omar Arnaout, M.D.

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • Removal of skull bone for removal of growth of upper brain (61510)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
71%Service-mix similarityView profile →

Michael Mooney, MD

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Telephone medical discussion with physician, 21-30 minutes (99443)
  • Computer-assisted procedure inside brain (61781)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
64%Service-mix similarityView profile →

Wenya Linda Bi

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • Removal of skull bone for removal of growth of upper brain (61510)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
61%Service-mix similarityView profile →

Robert Scott Heller, M.D.

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)
59%Service-mix similarityView profile →

Rafael A. Vega, MD, PHD

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • Removal of skull bone for removal of growth of upper brain (61510)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
57%Service-mix similarityView profile →

Jeffrey Stephen Schweitzer, MD

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Telephone medical discussion with physician, 21-30 minutes (99443)
  • 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)
57%Service-mix similarityView profile →

Muhammad M Abd-El-Barr, M.D., PH.D.

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Telephone medical discussion with physician, 21-30 minutes (99443)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
56%Service-mix similarityView profile →

Bob S Carter, M.D., PH.D.

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • 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)
53%Service-mix similarityView profile →

Gavin Peter Dunn, MD, PHD

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
50%Service-mix similarityView profile →

Nirav J Patel, M.D.

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)
50%Service-mix similarityView profile →

Pier Paolo Peruzzi, MD, PHD

Neurosurgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Computer-assisted procedure inside brain (61781)
  • Removal of skull bone for removal of growth of upper brain (61510)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
50%Service-mix similarityView profile →

Frederick George Barker, MD

Neurosurgery (CMS) · Boston, MA

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 moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
49%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.