A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of David Whitham Barker, MD with clinicians in the same registry specialty: Diagnostic Radiology · Nuclear Medicine (CMS).

PITTSBURGH, PA · Exact areaEdit location

2024 published service data · 225 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Bethany Casagranda, DO

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Dxa bone density measurement of forearm, finger, hand, or foot (77081)
59%Service-mix similarityView profile →

Nicholas Berry, MD

Specialty details in registry · Pittsburgh, PA

Shared published services
1 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
55%Service-mix similarityView profile →

Michael Allen Packard, D.O.

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Dxa bone density measurement of forearm, finger, hand, or foot (77081)
28%Service-mix similarityView profile →

Thomas Chang

Specialty details in registry · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Dxa bone density measurement of forearm, finger, hand, or foot (77081)
27%Service-mix similarityView profile →

Michelle Straka

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Dxa bone density measurement of forearm, finger, hand, or foot (77081)
26%Service-mix similarityView profile →

Danielle Sharek

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Dxa bone density measurement of forearm, finger, hand, or foot (77081)
25%Service-mix similarityView profile →

Jamie Hartman

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
1 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
25%Service-mix similarityView profile →

Jennifer Ames, M.D.

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
25%Service-mix similarityView profile →

Marcela Bohm-Velez, M.D.

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
2 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Dxa bone density measurement of forearm, finger, hand, or foot (77081)
24%Service-mix similarityView profile →

Shaifali Sharma, MD

Specialty details in registry · Pittsburgh, PA

Shared published services
1 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
21%Service-mix similarityView profile →

Saadia Khan Gosalia, DO

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
1 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
21%Service-mix similarityView profile →

Brett R. Nielson, D.O.

Diagnostic Radiology (CMS) · Pittsburgh, PA

Shared published services
3 shared services · view billing descriptions
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
  • Nuclear medicine study whole body with ct scan (78816)
20%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.