Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Derek Mai, MD

Individual provider Ophthalmology Physician · NPI 1588008031

Derek Mai, MD is an Ophthalmology Physician in Boston, Massachusetts. Licensed in Massachusetts and Minnesota. Registered with an NPI since 2013.

Licensed in
MA, MN
In the registry since
2013
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

243 Charles St
Boston, MA 02114-3002
Phone: (617) 573-3689
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 287087 (MA)
Ophthalmology Physician Taxonomy 207W00000X · Licence 58971 (MN)

Record details

NPI number1588008031
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 26, 2013
Last updated in NPPESJuly 14, 2021
Certification dateJuly 14, 2021

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients56
Services billed 60 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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