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

MADISON, WI · Exact areaEdit location

2024 published service data · 23 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

David B Niemann, MD

Neurosurgery (CMS) · Madison, WI

Shared published services
3 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)
  • Ultrasonic guidance for blood vessel access (76937)
  • 3d radiographic procedure with computerized image postprocessing (76377)
76%Service-mix similarityView profile →

Mark Corriveau, M.D.

Neurosurgery (CMS) · Madison, WI

Shared published services
3 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)
  • Ultrasonic guidance for blood vessel access (76937)
  • Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist (36224)
62%Service-mix similarityView profile →

Mustafa K Baskaya, MD

Neurosurgery (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
61%Service-mix similarityView profile →

Alex M Witek

Neurosurgery (CMS) · Madison, WI

Shared published services
3 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)
  • Ultrasonic guidance for blood vessel access (76937)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
51%Service-mix similarityView profile →

Wendell Bradley Lake, M.D.

Neurosurgery (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
48%Service-mix similarityView profile →

Robert J Dempsey, MD

Neurosurgery (CMS) · Madison, WI

Shared published services
3 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Computer-assisted procedure inside brain (61781)
47%Service-mix similarityView profile →

Nathaniel P. Brooks, M.D.

Neurosurgery (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
47%Service-mix similarityView profile →

Bradley Schmidt, M.D.

Neurosurgery (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
46%Service-mix similarityView profile →

Amgad Saddik Hanna, M.D.

Neurosurgery (CMS) · Madison, WI

Shared published services
3 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
46%Service-mix similarityView profile →

Elena Gutierrez, M.D.

Neurosurgery (CMS) · Madison, WI

Shared published services
3 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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • 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 →

Daniel K Resnick, MD

Neurosurgery (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
40%Service-mix similarityView profile →

Laura Stone Mcguire, M.D.

Neurosurgery (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
38%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.