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Compare the published Medicare service mix of William H Messerschmidt, M.D. with clinicians in the same registry specialty: Thoracic Surgery (CMS).

TN · Exact areaEdit location

2024 published service data · 70 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Allen Brian Wilcox, MD

Cardiac Surgery (CMS) · Nashville, TN

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)
52%Service-mix similarityView profile →

Chad R Swan, MD

Cardiac Surgery · General Surgery · Thoracic Surgery (CMS) · Hendersonville, TN

Shared published services
3 shared services · view billing descriptions
  • Injection of chemical agent into single incompetent vein of leg using ultrasound guidance (36465)
  • Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance (36475)
  • 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 →

Stephen Lee Martin, MD

Cardiac Surgery · Thoracic Surgery (CMS) · Chattanooga, TN

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)
32%Service-mix similarityView profile →

Sigrid Johannesen Ringenberg, MD

Thoracic Surgery (CMS) · Nashville, TN

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)
31%Service-mix similarityView profile →

Caitlin Theresa Demarest, M.D.

Thoracic Surgery (CMS) · Nashville, TN

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)
31%Service-mix similarityView profile →

Robert Taylor Ripley, MD

General Surgery · Thoracic Surgery (CMS) · Nashville, TN

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)
28%Service-mix similarityView profile →

Christian Patrick Probst, M.D.

Cardiac Surgery · Thoracic Surgery (CMS) · Knoxville, TN

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)
28%Service-mix similarityView profile →

Tammy Michelle Baxter, M.D.

Cardiac Surgery (CMS) · Nashville, TN

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)
24%Service-mix similarityView profile →

Swaroop Bommareddi, M.D.

Thoracic Surgery (CMS) · Nashville, TN

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)
21%Service-mix similarityView profile →

V Sreenath Reddy, MD

Cardiac Surgery · General Surgery · Thoracic Surgery (CMS) · Nashville, TN

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)
20%Service-mix similarityView profile →

Lifford L Lancaster, M.D.

Cardiac Surgery (CMS) · Nashville, TN

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)
20%Service-mix similarityView profile →

Billy D Parsons, MD

Thoracic Surgery (CMS) · Cookeville, TN

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)
19%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.