A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Christopher Lewis Mathe, PHD with clinicians in the same registry specialty: Psychologist.

CA · Exact areaEdit location

2024 published service data · 335 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Lois Nightingale, PHD

Psychologist · Yorba Linda, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Sandra Mary Abraham, PSYD

Psychologist · Gardena, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Vahe Sukiasyan, PSY.D

Psychologist · Sherman Oaks, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Alisa Brady, PHD

Psychologist · Carlsbad, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

G. Preston Sims, PH.D.

Psychologist · Solana Beach, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Kay Ellen Gallegos, PHD

Psychologist · Chico, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Elham Abouhamzeh, PSY.D

Psychologist · Irvine, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Christopher Sethness

Psychologist · Santa Rosa, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Max Aaron Garlick, PHD

Psychologist · Santa Cruz, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Darena Ann Bailey, PH.D.

Psychologist · Del Mar, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Kelly Warren, PSYD

Psychologist · Hermosa Beach, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%Service-mix similarityView profile →

Kenneth Garett, PHD

Psychologist · Palm Springs, CA

Shared published services
2 shared services · view billing descriptions
  • Psychotherapy, 1 hour (90837)
  • Psychiatric diagnostic evaluation (90791)
93%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.