Dr. Marlene San Nicolas, O.D.

With 20 years of practice, Dr. Marlene San Nicolas is an established optometry provider, O.D., after earning their medical degree at Pacific University - College Of Optometry in 1992. Dr. currently practices across 2 facilities, including Guam Memorial Hospital Authority in Tamuning, GU. Their National Provider Identifier (NPI) is 1154381515, and the profile below combines data from CMS NPPES, Medicare billing records, the HHS OIG exclusion list, and — where available — CMS Open Payments, Medicare Utilization, and Part D prescriber summaries.

Dr. Marlene San Nicolas's practice is located in ZIP 96913 (Tamuning, GU), which has an overall CartoChrome Healthcare Access Score of 28/100 (Limited Access). Access constraints in this ZIP code can affect wait times, specialist availability, and emergency response — context worth knowing when choosing a provider.

CMS Medicare data shows Dr. Marlene San Nicolas as a lower-volume optometry provider, treating approximately 186 Medicare beneficiaries and delivering 216 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.

Under the Physician Payments Sunshine Act, CMS reports that Dr. Marlene San Nicolas received $91 in industry payments in 2023. Payments at this scale are typical for most practicing physicians and generally reflect routine educational activities.