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Compare the published Medicare service mix of Ronald J. De Vries, PH.D with clinicians in the same registry specialty: Clinical Psychologist (CMS).

WA · Exact areaEdit location

2024 published service data · 104 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Dennis Dyck, PH.D.

Clinical Psychologist (CMS) · Spokane Valley, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
100%Service-mix similarityView profile →

Melvin Watt, PHD

Clinical Psychologist (CMS) · Tacoma, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
100%Service-mix similarityView profile →

Craig Allen Lammers, PH.D.

Clinical Psychologist (CMS) · Spokane, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
85%Service-mix similarityView profile →

Chrystal Joy Agnor, PH.D.

Clinical Psychologist (CMS) · Vancouver, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
79%Service-mix similarityView profile →

Kimberly M Chupurdia, PHD

Clinical Psychologist (CMS) · Spokane, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
76%Service-mix similarityView profile →

Nancy B Corbin, PHD

Clinical Psychologist (CMS) · Vancouver, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
75%Service-mix similarityView profile →

Laura Anne Farley, PSY.D.

Clinical Psychologist (CMS) · Vancouver, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
74%Service-mix similarityView profile →

Talia Sue Cronk, PSYD

Specialty details in registry · Vancouver, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
71%Service-mix similarityView profile →

Sonja Seltzer Sackman, PHD

Clinical Psychologist (CMS) · Vashon, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
68%Service-mix similarityView profile →

Anthony Delbert, PHD

Clinical Psychologist (CMS) · Spokane Valley, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
68%Service-mix similarityView profile →

Yuliya Johnson

Clinical Psychologist (CMS) · Lakewood, WA

Shared published services
1 shared services · view billing descriptions
  • Psychotherapy, 45 minutes (90834)
66%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.