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Compare the published Medicare service mix of Andrew Leon Kau, MD with clinicians in the same registry specialty: Allergy/Immunology · Internal Medicine (CMS).

SAINT LOUIS, MO · Exact areaEdit location

2024 published service data · 13 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

H J Wedner, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Injection of drug or substance under skin or into muscle (96372)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Professional service for multiple injections of allergen (95117)
61%Service-mix similarityView profile →

Maya Ratna Jerath, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Injection of drug or substance under skin or into muscle (96372)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Professional service for multiple injections of allergen (95117)
55%Service-mix similarityView profile →

Tiffany Biason Dy, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Injection of drug or substance under skin or into muscle (96372)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Professional service for multiple injections of allergen (95117)
50%Service-mix similarityView profile →

Katharine Jean Nehme, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
1 shared services · view billing descriptions
  • Professional service for multiple injections of allergen (95117)
50%Service-mix similarityView profile →

Shirley S Joo, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
2 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)
  • Professional service for multiple injections of allergen (95117)
47%Service-mix similarityView profile →

Jennifer Marie Monroy, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Injection of drug or substance under skin or into muscle (96372)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Professional service for multiple injections of allergen (95117)
45%Service-mix similarityView profile →

Aaron Martin Ver Heul, MD

Specialty details in registry · Saint Louis, MO

Shared published services
1 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)
44%Service-mix similarityView profile →

Mark S Dykewicz, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
1 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)
42%Service-mix similarityView profile →

Barbara C Jost, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Injection of drug or substance under skin or into muscle (96372)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Professional service for multiple injections of allergen (95117)
42%Service-mix similarityView profile →

Omar Hani Elsayed-Ali, MD

Allergy/Immunology · Internal Medicine · Pediatric Medicine (CMS) · Saint Louis, MO

Shared published services
2 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)
  • Professional service for multiple injections of allergen (95117)
34%Service-mix similarityView profile →

Ofer Zimmerman, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
1 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)
30%Service-mix similarityView profile →

Cheshil P Dixit, MD

Allergy/Immunology · Internal Medicine (CMS) · Saint Louis, MO

Shared published services
1 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)
26%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.