A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Christos Theophanous, M.D. with clinicians in the same registry specialty: Ophthalmology.

PALO ALTO, CA · Exact areaEdit location

2024 published service data · 16 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Debbie Kuo, M.D.

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
90%Service-mix similarityView profile →

Mary Ann Lloyd, MD

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
86%Service-mix similarityView profile →

Jason W Much, MD

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
80%Service-mix similarityView profile →

Eirene Wong, MD

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
76%Service-mix similarityView profile →

Thomas Tayeri, M.D.

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
76%Service-mix similarityView profile →

Jessica Low Chen, M.D.

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
72%Service-mix similarityView profile →

Susan Connolly, MD

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
70%Service-mix similarityView profile →

Neil Jay Friedman, MD

Ophthalmology · Palo Alto, CA

Shared published services
3 shared services · view billing descriptions
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
  • Removal of cataract with insertion of prosthetic lens (66984)
65%Service-mix similarityView profile →

Marc H Levin, MD

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
60%Service-mix similarityView profile →

Hyunjin Jane J Kim, M.D.

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
59%Service-mix similarityView profile →

Amal Muhammad Taher Al-Lozi, MD

Ophthalmology · Palo Alto, CA

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)
  • Imaging of optic nerve (92133)
  • Exam of visual field with extended testing (92083)
54%Service-mix similarityView profile →

Gurunadh Atmaram Vemulakonda, MD

Ophthalmology · Palo Alto, CA

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)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
  • Imaging of retina (92134)
49%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.