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Compare the published Medicare service mix of Maheshkumar Vyas, M.D. with clinicians in the same registry specialty: Allergy/Immunology · Family Practice (CMS).

CA · Exact areaEdit location

2024 published service data · 201 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Eugene Wayne Tsai, MD

Allergy/Immunology (CMS) · Artesia, CA

Shared published services
2 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
67%Service-mix similarityView profile →

Aqil P Imam, MD

Allergy/Immunology (CMS) · Rancho Mirage, CA

Shared published services
1 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
63%Service-mix similarityView profile →

Karl Friedrich Vontiehl, M.D.

Allergy/Immunology (CMS) · San Marino, CA

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
61%Service-mix similarityView profile →

Michael Christopher Balduzzi, MD

Allergy/Immunology (CMS) · Stockton, CA

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
60%Service-mix similarityView profile →

David John Waldman, M.D.

Allergy/Immunology (CMS) · Rancho Mirage, CA

Shared published services
2 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
59%Service-mix similarityView profile →

Otto Liao, M.D.

Allergy/Immunology · Internal Medicine · Pediatric Medicine (CMS) · Tustin, CA

Shared published services
2 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
59%Service-mix similarityView profile →

Rajashri S Iyengar, M.D.

Allergy/Immunology (CMS) · San Carlos, CA

Shared published services
2 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
57%Service-mix similarityView profile →

Richard M Harris, MD

Allergy/Immunology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
57%Service-mix similarityView profile →

William G Harris, MD

Allergy/Immunology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
57%Service-mix similarityView profile →

Henry Lin, MD

Allergy/Immunology · Internal Medicine (CMS) · Rancho Cucamonga, CA

Shared published services
2 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
57%Service-mix similarityView profile →

Raffi Tachdjian, M.D.

Allergy/Immunology · Pediatric Medicine (CMS) · Santa Monica, CA

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
56%Service-mix similarityView profile →

Sandra Ann Ho, MD

Allergy/Immunology · Internal Medicine (CMS) · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
55%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.