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Compare the published Medicare service mix of Lucas Maier Duvall, MD with clinicians in the same registry specialty: Cardiac Surgery · General Surgery · Hospitalist · Thoracic Surgery (CMS).

HOUSTON, TX · Exact areaEdit location

2024 published service data · 61 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

James J Livesay, M.D.

Thoracic Surgery (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)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Replacement of aortic valve through the skin and femoral artery (33361)
60%Service-mix similarityView profile →

Walter W Ohara, MD

Thoracic Surgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Exclusion of appendage of left upper chamber of heart performed during other procedure on chest (33268)
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Harvest of vein using an endoscope (33508)
57%Service-mix similarityView profile →

Mahesh Ramchandani, MD

Thoracic Surgery · Vascular Surgery (CMS) · Houston, TX

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)
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Harvest of vein using an endoscope (33508)
57%Service-mix similarityView profile →

Thomas Macgillivray, MD

Thoracic Surgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Harvest of vein using an endoscope (33508)
  • Replacement of aortic valve through the skin and femoral artery (33361)
55%Service-mix similarityView profile →

Marvin Douglas Atkins, MD

Thoracic Surgery · Vascular Surgery (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)
  • 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)
54%Service-mix similarityView profile →

Gerald Murray Lawrie, MD

Thoracic Surgery (CMS) · Houston, TX

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)
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Harvest of vein using an endoscope (33508)
54%Service-mix similarityView profile →

Keshava Rajagopal, MD PHD

Cardiac Surgery · Thoracic Surgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
53%Service-mix similarityView profile →

Ross M Reul, M.D.

Cardiac Surgery · Thoracic Surgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Exclusion of appendage of left upper chamber of heart performed during other procedure on chest (33268)
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Harvest of vein using an endoscope (33508)
53%Service-mix similarityView profile →

Michael S Sweeney, M.D.,

Specialty details in registry · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Harvest of vein using an endoscope (33508)
  • Coronary artery bypass using vein or artery graft, 2 grafts (33518)
52%Service-mix similarityView profile →

Fernando Ramirez Del Val, MD

General Surgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Harvest of vein using an endoscope (33508)
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
51%Service-mix similarityView profile →

Juan Eduardo Marcano, M.D.

General Surgery · Thoracic Surgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Harvest of vein using an endoscope (33508)
50%Service-mix similarityView profile →

Robert Andrew Hetz, M.D.

General Surgery · Thoracic Surgery (CMS) · Houston, TX

Shared published services
3 shared services · view billing descriptions
  • Coronary artery bypass using artery graft, 1 graft (33533)
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using vein or artery graft, 2 grafts (33518)
49%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.