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Compare the published Medicare service mix of Thuong Nguyen, M.D. with clinicians in the same registry specialty: Allergy/Immunology (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.

Jamila C. Martin, M.D.

Allergy/Immunology (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
94%Service-mix similarityView profile →

Robert William Ziering, M.D.

Allergy/Immunology (CMS) · Vista, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
94%Service-mix similarityView profile →

Mark I Grijnsztein, M.D.

Allergy/Immunology (CMS) · Elk Grove, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
93%Service-mix similarityView profile →

Charles Hsiao-Kung Feng, MD

Allergy/Immunology (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
92%Service-mix similarityView profile →

Mohan P. Reddy

Allergy/Immunology · Internal Medicine (CMS) · Merced, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
91%Service-mix similarityView profile →

Andrea Maria Miller-Lari, D.O

Allergy/Immunology (CMS) · Oroville, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
90%Service-mix similarityView profile →

Chyh Woei Lee, MD

Allergy/Immunology (CMS) · Fremont, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
90%Service-mix similarityView profile →

Juline Natalia Caraballo Fonseca, M.D.

Allergy/Immunology · Internal Medicine (CMS) · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
90%Service-mix similarityView profile →

Ali Amirzadeh, M.D.

Allergy/Immunology · Internal Medicine (CMS) · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
89%Service-mix similarityView profile →

Karl Friedrich Vontiehl, M.D.

Allergy/Immunology (CMS) · San Marino, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
89%Service-mix similarityView profile →

Patty Peng-Jung Chi, MD

Allergy/Immunology · Internal Medicine (CMS) · Mountain View, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
88%Service-mix similarityView profile →

Marc Lawrence Dyer, MD

Allergy/Immunology · Pediatric Medicine (CMS) · Laguna Niguel, CA

Shared published services
3 shared services · view billing descriptions
  • Test for allergy using allergenic extract (95004)
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
88%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.