HCPList Know more before you call. About
A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Nathan Christopher Rowland with clinicians in the same registry specialty: Neurosurgery (CMS).

CHARLESTON, SC · Exact areaEdit location

2024 published service data · 19 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

William Alexander Vandergrift, M.D.

Neurosurgery (CMS) · Charleston, SC

Shared published services
2 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)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
46%Service-mix similarityView profile →

Sunil J Patel, MD

Neurosurgery (CMS) · Charleston, SC

Shared published services
2 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)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
45%Service-mix similarityView profile →

Istvan Takacs, MD

Neurosurgery (CMS) · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Insertion of brain neurostimulator pulse device with connection to single electrode array (61885)
  • Removal of skull bone with computer-assisted insertion of neurostimulator electrodes in brain with recording, first array (61867)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
38%Service-mix similarityView profile →

Stephen Paul Kalhorn, M.D.

Neurosurgery (CMS) · Charleston, SC

Shared published services
2 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)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
36%Service-mix similarityView profile →

Roberta Kay Sefcik, MD, MSCR

Neurosurgery (CMS) · Charleston, SC

Shared published services
1 shared services · view billing descriptions
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
34%Service-mix similarityView profile →

Steven Steuer Glazier, MD

Neurosurgery (CMS) · Charleston, SC

Shared published services
1 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)
31%Service-mix similarityView profile →

Alejandro Marin Spiotta, M.D.

Neurosurgery (CMS) · Charleston, SC

Shared published services
2 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)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
26%Service-mix similarityView profile →

George Hasham Khoury, MD

Neurology (CMS) · Charleston, SC

Shared published services
1 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)
25%Service-mix similarityView profile →

Robert Morgan Stuart, M.D.

Neurosurgery (CMS) · Charleston, SC

Shared published services
1 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)
24%Service-mix similarityView profile →

Clayton Lee Haldeman, M.D.

Neurosurgery (CMS) · Charleston, SC

Shared published services
1 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)
23%Service-mix similarityView profile →

Kimberly Price Kicielinski, M.D.

Neurosurgery (CMS) · Charleston, SC

Shared published services
1 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)
21%Service-mix similarityView profile →

Abhay Kumar Varma, MD

Neurosurgery (CMS) · Charleston, SC

Shared published services
1 shared services · view billing descriptions
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
20%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.