A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of George John Vassar, MD with clinicians in the same registry specialty: Urology (CMS).

SAN ANTONIO, TX · Exact areaEdit location

2024 published service data · 44 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Daniel R Saltzstein, MD

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
92%Service-mix similarityView profile →

Samuel Hakim, MD

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
91%Service-mix similarityView profile →

Kyle Jones Weld, MD

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
89%Service-mix similarityView profile →

John Lavin, M.D.

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
88%Service-mix similarityView profile →

Douglas Russell, DO

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
87%Service-mix similarityView profile →

Daniel Alberto Yelfimov, M.D.

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
87%Service-mix similarityView profile →

John Robert Case, M.D.

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
87%Service-mix similarityView profile →

Kenneth John Stallman, M.D.

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
87%Service-mix similarityView profile →

Michael Anthony White, D.O.

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
86%Service-mix similarityView profile →

Jose De La Cerda, M.D.

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
86%Service-mix similarityView profile →

Matthew David Rogers, M.D.

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
86%Service-mix similarityView profile →

Christopher H Cantrill, MD

Urology (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Manual urinalysis test with examination using microscope, automated (81001)
  • Detection test by nucleic acid for organism, amplified probe technique (87798)
83%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.