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Compare the published Medicare service mix of John E Shallat, MD with clinicians in the same registry specialty: Emergency Medicine.

DEER PARK, NY · 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 · 128 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Rosetta Grella, MD

Emergency Medicine · Bay Shore, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
97%Service-mix similarity~5.7 milesView profile →

Sarah Arzt, DO

Emergency Medicine · Smithtown, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
97%Service-mix similarity~8.8 milesView profile →

Michelle Gebhard, DO

Emergency Medicine · West Islip, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
95%Service-mix similarity~3.5 milesView profile →

William F Flader, M.D.

Emergency Medicine · Smithtown, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
92%Service-mix similarity~8.8 milesView profile →

Steven J Zimmerman, M.D.

Emergency Medicine · West Islip, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
92%Service-mix similarity~3.5 milesView profile →

Louis Filippone, MD

Emergency Medicine · Huntington, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
90%Service-mix similarity~8.7 milesView profile →

Thomas Fischer, M.D.

Emergency Medicine · Smithtown, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
90%Service-mix similarity~8.8 milesView profile →

James Halfpenny, DO

Emergency Medicine · Bay Shore, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
89%Service-mix similarity~5.7 milesView profile →

Lynda Martins, DO

Emergency Medicine · Commack, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
89%Service-mix similarity~6.3 milesView profile →

Patricia Marie Daly, MD

Emergency Medicine · Bay Shore, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
88%Service-mix similarity~5.7 milesView profile →

Oreste Joseph Bruni, MD

Emergency Medicine · Woodbury, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
88%Service-mix similarity~8.6 milesView profile →

Craig C Lerman, MD

Emergency Medicine · Huntington, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
86%Service-mix similarity~8.7 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.