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

HOUSTON, TX · Exact areaEdit location

2024 published service data · 87 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Baraa Al-Hafez, M.D

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
53%Service-mix similarityView profile →

Timothy M Robinson, M.D.

Interventional Radiology · Neurosurgery (CMS) · Houston, TX

Shared published services
2 shared services · view billing descriptions
  • 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)
47%Service-mix similarityView profile →

John Christopher Quinn, M.D.

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • 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)
47%Service-mix similarityView profile →

Sebastian Villarreal, M.D.

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
46%Service-mix similarityView profile →

Jessica Stark, MD

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
46%Service-mix similarityView profile →

Yevgeniy Freyvert, MD

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
42%Service-mix similarityView profile →

John M. Caridi, MD

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
42%Service-mix similarityView profile →

Mahmood Moradi, M.D., FAANS

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Graft of donor bone to spine (20931)
41%Service-mix similarityView profile →

Jonathan Sellin, MD

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
41%Service-mix similarityView profile →

Richard Louis Harper, MD

Neurosurgery (CMS) · Houston, TX

Shared published services
2 shared services · view billing descriptions
  • 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)
40%Service-mix similarityView profile →

Andrew Christopher Roeser, M.D.

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Fusion of additional segment of spine (22614)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
39%Service-mix similarityView profile →

Jeremy Cheng-Yuh Wang, M.D.

Neurosurgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Fusion of spine in lower back with partial removal of spine bone and disc (22633)
39%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.