Mark Tony Williams, M.D. / Similar service patterns
A DIFFERENT WAY TO EXPLORE Similar work. More providers to explore. Compare the published Medicare service mix of Mark Tony Williams, M.D. with clinicians in the same registry specialty: Ophthalmology (CMS).
CA · Exact area Edit location
2024 published service data · 179 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.
Ophthalmology (CMS) · Santa Ana, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Laguna Hills, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Santa Rosa, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Los Angeles, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Encino, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Los Angeles, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Santa Ana, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Laguna Hills, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Injection of drug into eye (67028) Ophthalmology (CMS) · Riverside, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Los Angeles, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Beverly Hills, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) Ophthalmology (CMS) · Walnut Creek, CA
Shared published services 3 shared services · view billing descriptions Imaging of retina (92134) Extended exam of the back part of the eye with retinal drawing (92201) Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214) 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.