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Compare the published Medicare service mix of Gregory Alan Van Dam, PSY.D. with clinicians in the same registry specialty: Clinical Psychologist (CMS).

WINTER PARK, FL · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 19 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Gregory John Vitale, PSYD

Psychiatry (CMS) · Orlando, FL

Shared published services
2 shared services · view billing descriptions
  • Administration of psychological or neuropsychological test, each additional 30 minutes (96137)
  • Administration of psychological or neuropsychological test, first 30 minutes (96136)
41%Service-mix similarity~6.0 milesView profile →

Valerie Acosta, PSY.D

Clinical Psychologist (CMS) · Orlando, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
26%Service-mix similarity~9.5 milesView profile →

Lesley Hulett-Johnson, PSY.D.

Clinical Psychologist (CMS) · Winter Springs, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
25%Service-mix similarity~7.0 milesView profile →

Tamara Velazquez, PSY.D.

Clinical Psychologist (CMS) · Orlando, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
22%Service-mix similarity~9.5 milesView profile →

Jaymielee Soto Diaz, PSYD

Clinical Psychologist (CMS) · Orlando, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
22%Service-mix similarity~8.6 milesView profile →

Daniel Lee Paulson, PHD

Clinical Psychologist (CMS) · Casselberry, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
20%Service-mix similarity~5.6 milesView profile →

Shatha Atiya, PSY.D.

Clinical Psychologist (CMS) · Orlando, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
19%Service-mix similarity~9.5 milesView profile →

Nicholas Joseph, PHD

Specialty details in registry · Longwood, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
18%Service-mix similarity~9.7 milesView profile →

Sharon Rifkin Thetford, PSY.D.

Clinical Psychologist (CMS) · Longwood, FL

Shared published services
1 shared services · view billing descriptions
  • Psychiatric diagnostic evaluation (90791)
14%Service-mix similarity~9.7 milesView 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 approximate distance 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.