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Compare the published Medicare service mix of Andrew Kai-Hong Chan, MD 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.

Ibrahim Hussain, MD

Neurosurgery (CMS) · New York, NY

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)
  • Fusion of additional segment of spine (22614)
76%Service-mix similarityView profile →

Nirit Weiss, M.D.

Neurosurgery (CMS) · New York, NY

Shared published services
2 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)
60%Service-mix similarityView profile →

Anthony Frempong-Boadu, M.D.

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
55%Service-mix similarityView profile →

Dean Chou, MD

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
  • Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment (63048)
54%Service-mix similarityView profile →

Christopher Eliot Mandigo, M.D.

Neurosurgery (CMS) · New York, NY

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)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
49%Service-mix similarityView profile →

Raj K Shrivastava, MD

Neurosurgery (CMS) · New York, NY

Shared published services
2 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)
47%Service-mix similarityView profile →

Assaf Berger, MD

Neurosurgery (CMS) · New York, NY

Shared published services
1 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)
45%Service-mix similarityView profile →

Jason A. Ellis, M.D.

Neurosurgery (CMS) · New York, NY

Shared published services
2 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)
44%Service-mix similarityView profile →

Michael Singh Virk, M.D., PH.D.

Neurosurgery (CMS) · New York, NY

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)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
  • Computer-assisted spinal procedure (61783)
42%Service-mix similarityView profile →

Fedor E Panov, M.D.

Neurosurgery (CMS) · New York, NY

Shared published services
2 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)
41%Service-mix similarityView profile →

Roger Hartl, MD

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
  • Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment (63048)
41%Service-mix similarityView profile →

Darryl Lau, MD

Neurosurgery (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
  • Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment (63048)
40%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.