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 Tomoyoshi Shigematsu, M.D., PH.D. with clinicians in the same registry specialty: Neurosurgery (CMS).

NEW YORK, NY · Exact areaEdit location

2024 published service data · 86 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Jared Knopman, MD

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Imaging of blood vessel (75898)
63%Service-mix similarityView profile →

Christopher Paul Kellner, M.D.

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Imaging of blood vessel (75898)
  • Review by radiologist of image for insertion of material to block blood flow (75894)
61%Service-mix similarityView profile →

Howard A Riina, M.D.

Interventional Radiology · Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Imaging of blood vessel (75898)
  • Review by radiologist of image for insertion of material to block blood flow (75894)
56%Service-mix similarityView profile →

J. Duffy Mocco, MD

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Imaging of blood vessel (75898)
  • Review by radiologist of image for insertion of material to block blood flow (75894)
56%Service-mix similarityView profile →

Shahram Majidi, M.D.

Diagnostic Radiology · Neurology · Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Imaging of blood vessel (75898)
  • Review by radiologist of image for insertion of material to block blood flow (75894)
  • Occlusion of central nervous system or spinal cord artery (61624)
55%Service-mix similarityView profile →

Erez Nossek, M.D.

Neurosurgery · Vascular Surgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Review by radiologist of image for insertion of material to block blood flow (75894)
  • Occlusion of central nervous system or spinal cord artery (61624)
53%Service-mix similarityView profile →

Thomas W Link, M.D., M.S.

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Imaging of blood vessel (75898)
  • Review by radiologist of image for insertion of material to block blood flow (75894)
52%Service-mix similarityView profile →

Kurt Yaeger, MD

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Imaging of blood vessel (75898)
  • Review by radiologist of image for insertion of material to block blood flow (75894)
49%Service-mix similarityView profile →

Robert Bartley Snow, MD

Specialty details in registry · New York, NY

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
33%Service-mix similarityView profile →

Martin Zonenshayn, M.D.

Neurosurgery (CMS) · New York, NY

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
32%Service-mix similarityView profile →

Michael Travis Caton, M.D.

Diagnostic Radiology · Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist (36227)
  • Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist (36223)
32%Service-mix similarityView profile →

Justin Schwarz, M.D.

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist (36223)
  • Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance (61645)
28%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.