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Compare the published Medicare service mix of Alan Fein, MD with clinicians in the same registry specialty: Critical Care (Intensivists) · Pulmonary Disease (CMS).

LAKE SUCCESS, NY · Exact areaEdit location

2024 published service data · 9 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Leonard J. Landesberg, MD

Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Test to examine how well the lungs exchange gases (94729)
73%Service-mix similarityView profile →

Denise Janus Ruttgeizer, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Test to examine how well the lungs exchange gases (94729)
70%Service-mix similarityView profile →

David M. Breidbart, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Test to examine how well the lungs exchange gases (94729)
65%Service-mix similarityView profile →

Paul Kuperschmid, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Test to examine how well the lungs exchange gases (94729)
63%Service-mix similarityView profile →

Jason B. Karp, MD

Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
  • Test to determine lung volumes using gas dilution or washout (94727)
60%Service-mix similarityView profile →

Deborah M. Ushkow, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Test to examine how well the lungs exchange gases (94729)
59%Service-mix similarityView profile →

Jay S. Berland, MD

Pulmonary Disease · Sleep Medicine (CMS) · Lake Success, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Test to examine how well the lungs exchange gases (94729)
52%Service-mix similarityView profile →

Lawrence Shulman, MD

Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
2 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)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
38%Service-mix similarityView profile →

David M Katz, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Lake Success, NY

Shared published services
1 shared services · view billing descriptions
  • Test to measure expiratory airflow and volume (94010)
6%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.