James W Umlas, MD
Ophthalmology · Lexington, MA
Shared published services3 shared services · view billing descriptions
93%Service-mix similarity~7.6 milesView profile →
Similar work.
More providers to explore.
Compare the published Medicare service mix of Mandi Zaltas Kunen, M.D. with clinicians in the same registry specialty: Ophthalmology.
CONCORD, MA · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance
Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works
2024 published service data · 37 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.
Deborah Lynn Mccoy, M.D.
Ophthalmology · Lexington, MA
Shared published services3 shared services · view billing descriptions
92%Service-mix similarity~7.6 milesView profile →
Nedda Del Plato
Ophthalmology · Lexington, MA
Shared published services3 shared services · view billing descriptions
90%Service-mix similarity~7.6 milesView profile →
Nina Marie Farivari, M.D.
Ophthalmology · Lexington, MA
Shared published services3 shared services · view billing descriptions
89%Service-mix similarity~7.6 milesView profile →
James Kim, M.D., PH.D.
Ophthalmology · Chelmsford, MA
Shared published services3 shared services · view billing descriptions
89%Service-mix similarity~9.3 milesView profile →
David Hyungjun Yi, MD
Ophthalmology · Chelmsford, MA
Shared published services3 shared services · view billing descriptions
89%Service-mix similarity~9.3 milesView profile →
Ambika Sud Hoguet, M.D.
Ophthalmology · Waltham, MA
Shared published services3 shared services · view billing descriptions
88%Service-mix similarity~7.7 milesView profile →
Olivia Liao, MD
Ophthalmology · Lexington, MA
Shared published services3 shared services · view billing descriptions
88%Service-mix similarity~7.6 milesView profile →
Cecily Elaine Hamill, MD, PHD
Ophthalmology · Chelmsford, MA
Shared published services3 shared services · view billing descriptions
87%Service-mix similarity~9.3 milesView profile →
Jeremy Zvi Kieval, M.D.
Ophthalmology · Lexington, MA
Shared published services3 shared services · view billing descriptions
83%Service-mix similarity~7.6 milesView profile →
Chelsea Lynn Gottschalk, MD
Ophthalmology · Lexington, MA
Shared published services3 shared services · view billing descriptions
83%Service-mix similarity~7.6 milesView profile →
Eric L Putnoi, MD
Ophthalmology · Waltham, MA
Shared published services3 shared services · view billing descriptions
82%Service-mix similarity~9.6 milesView 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 approximate distance 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.