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Compare the published Medicare service mix of John Daniel Ng, MD with clinicians in the same registry specialty: Ophthalmology (CMS).

PORTLAND, OR · Exact areaEdit location

2024 published service data · 6 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Davin Carlton Ashraf, M.D.

Ophthalmology (CMS) · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Photography of content of eyes (92285)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Exam of visual field with limited testing (92081)
52%Service-mix similarityView profile →

Eric Alan Steele, MD

Ophthalmology (CMS) · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Photography of content of eyes (92285)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Extensive repair of turning-outward eyelid defect (67917)
43%Service-mix similarityView profile →

Roger Allan Dailey, MD

Ophthalmology · Plastic And Reconstructive Surgery (CMS) · Portland, OR

Shared published services
2 shared services · view billing descriptions
  • Photography of content of eyes (92285)
  • Exam of visual field with limited testing (92081)
42%Service-mix similarityView profile →

Natalie Anne Hoesly, MD

Ophthalmology (CMS) · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Photography of content of eyes (92285)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Exam of visual field with limited testing (92081)
40%Service-mix similarityView profile →

Francisco Castillo, MD

Ophthalmology (CMS) · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Photography of content of eyes (92285)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Extensive repair of turning-outward eyelid defect (67917)
36%Service-mix similarityView profile →

Prashanth Nmi Vallabhanath, MD

Ophthalmology · Plastic And Reconstructive Surgery (CMS) · Portland, OR

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Exam of visual field with limited testing (92081)
20%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.