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Compare the published Medicare service mix of Michael Tzen-Jeh Chang, MD with clinicians in the same registry specialty: Otolaryngology (CMS).

STANFORD, CA · Exact areaEdit location

2024 published service data · 21 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Axel Eluid Renteria, MD

Specialty details in registry · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • Biopsy or removal of nasal polyp or tissue using an endoscope (31237)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
77%Service-mix similarityView profile →

Jayakar V Nayak, MD

Specialty details in registry · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • Biopsy or removal of nasal polyp or tissue using an endoscope (31237)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
77%Service-mix similarityView profile →

Zara Marzban Patel, MD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • Biopsy or removal of nasal polyp or tissue using an endoscope (31237)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
71%Service-mix similarityView profile →

Tristan Mark Tham Yong Ren, MD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
70%Service-mix similarityView profile →

Uchechukwu Chukwudozie Megwalu, MD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
69%Service-mix similarityView profile →

Matthew Kun Lee

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
69%Service-mix similarityView profile →

Fahed Noel Ayoub, MD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • Biopsy or removal of nasal polyp or tissue using an endoscope (31237)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
68%Service-mix similarityView profile →

Lukas David Landegger, MD, PHD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • 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 low level of medical decision making, if using time, 30 minutes or more (99203)
64%Service-mix similarityView profile →

Brian Anthony Nuyen, MD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
59%Service-mix similarityView profile →

Jarrod Adam Keeler, M.D.

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Diagnostic exam of nasal passages using an endoscope (31231)
  • 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 low level of medical decision making, if using time, 30 minutes or more (99203)
56%Service-mix similarityView profile →

Eric Anthony Nash, MD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • 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 low level of medical decision making, if using time, 30 minutes or more (99203)
50%Service-mix similarityView profile →

Chih-Kwang Sung, MD

Otolaryngology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
  • 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 low level of medical decision making, if using time, 30 minutes or more (99203)
44%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.