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Compare the published Medicare service mix of Gregory William Hall, MA with clinicians in the same registry specialty: Qualified Audiologist (CMS).

SAN MARCOS, CA · 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 · 11 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Lynne Michelle Baum, M.A., CCC-A

Qualified Audiologist (CMS) · Encinitas, CA

Shared published services
2 shared services · view billing descriptions
  • Test for eardrum and muscle function (92550)
  • Comprehensive hearing and speech recognition test (92557)
79%Service-mix similarity~8.1 milesView profile →

Lydia Leilani Earles, AUD

Qualified Audiologist (CMS) · Carlsbad, CA

Shared published services
2 shared services · view billing descriptions
  • Test for eardrum and muscle function (92550)
  • Comprehensive hearing and speech recognition test (92557)
72%Service-mix similarity~9.0 milesView profile →

Blake B Wimmer, AUD

Qualified Audiologist (CMS) · Carlsbad, CA

Shared published services
2 shared services · view billing descriptions
  • Test for eardrum and muscle function (92550)
  • Comprehensive hearing and speech recognition test (92557)
71%Service-mix similarity~7.4 milesView profile →

Sean Michael Tubbs, AU.D.

Specialty details in registry · Oceanside, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
71%Service-mix similarity~7.6 milesView profile →

Katherine Morrow Alsbury, AUD.

Qualified Audiologist (CMS) · Oceanside, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
50%Service-mix similarity~7.6 milesView profile →

Amy Marie Marin

Qualified Audiologist (CMS) · Escondido, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
50%Service-mix similarity~6.2 milesView profile →

David M Illich, AUD, C.C.C.A.

Specialty details in registry · Escondido, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
50%Service-mix similarity~6.2 milesView profile →

Jocelyn Yang, AUD

Qualified Audiologist (CMS) · Escondido, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
50%Service-mix similarity~6.2 milesView profile →

Heather Marie Cones, AU.D.

Qualified Audiologist (CMS) · Escondido, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
50%Service-mix similarity~6.2 milesView profile →

Robert Brian Ellis

Qualified Audiologist (CMS) · Escondido, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
49%Service-mix similarity~4.6 milesView profile →

Sara Louise Mattson, AU.D., CCC-A

Qualified Audiologist (CMS) · Rancho Santa Fe, CA

Shared published services
1 shared services · view billing descriptions
  • Comprehensive hearing and speech recognition test (92557)
47%Service-mix similarity~9.5 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.