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

OKLAHOMA CITY, OK · Exact areaEdit location

2024 published service data · 29 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Nathaniel David Stetson, DO

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
65%Service-mix similarityView profile →

Michael R Hahn, M.D.

Neurosurgery (CMS) · Oklahoma City, OK

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 cage or mesh device to spine bone and disc space during spine fusion (22853)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
62%Service-mix similarityView profile →

Isaac Obiri Karikari, MD

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
59%Service-mix similarityView profile →

Jacob Archer, M.D.

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
52%Service-mix similarityView profile →

Robert Jerome Wienecke, M.D.

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
51%Service-mix similarityView profile →

Fadi F Nasr, MD

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
50%Service-mix similarityView profile →

Joseph Bridger Cox, MD

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
50%Service-mix similarityView profile →

Zachary Adam Smith, M.D.

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)
47%Service-mix similarityView profile →

Robert E Tibbs, M.D.

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
42%Service-mix similarityView profile →

Benjamin T White, MD

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
41%Service-mix similarityView profile →

Brian Snell, MD

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)
40%Service-mix similarityView profile →

Caple A Spence, MD

Neurosurgery (CMS) · Oklahoma City, OK

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)
  • Fusion of additional segment of spine (22614)
  • Placement of stabilizing device to back, 3-6 spine bone segments (22842)
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.