A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Christina Ashley Dreffein, AU.D. with clinicians in the same registry specialty: Qualified Audiologist (CMS).

OAK LAWN, IL · 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 · 21 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Lauren Olivia Kelly, AUD

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
  • Test for hearing various pitches using earphone (92552)
89%Service-mix similarity~8.3 milesView profile →

Jacqueline K Hudson

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~6.0 milesView profile →

Katie Elizabeth Rock, AU.D.

Specialty details in registry · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~6.0 milesView profile →

Ayelet Hamburger, AU.D.

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~8.3 milesView profile →

Toryn Davis, AUD, CCC-A

Specialty details in registry · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~8.3 milesView profile →

Lindsey Anne Portugal, AU.D.

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~7.1 milesView profile →

Jamie Natkin, AUD

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~6.0 milesView profile →

Michael Hefferly, MA

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~8.3 milesView profile →

Erika Knox, AU.D.

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
87%Service-mix similarity~8.3 milesView profile →

Jaclyn Michelle Riel, AU.D.

Qualified Audiologist (CMS) · Palos Hills, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
86%Service-mix similarity~7.0 milesView profile →

Laura Nicole Dejulia, AUD

Qualified Audiologist (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
  • Test for hearing various pitches using earphone (92552)
85%Service-mix similarity~7.1 milesView profile →

Theresa Trimarco, AU.D.

Qualified Audiologist (CMS) · Oak Park, IL

Shared published services
2 shared services · view billing descriptions
  • Test to assess middle ear function (92567)
  • Comprehensive hearing and speech recognition test (92557)
82%Service-mix similarity~8.3 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.