Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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John C Merriam, MD

Individual provider Ophthalmology Physician · NPI 1821010307

John C Merriam, MD is an Ophthalmology in New York, New York. Graduated from Harvard Medical School in 1977, 49 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New York.

Years since qualifying
49
Trained at
Harvard Medical School
Licensed in
NY
In the registry since
2006
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

635 W 165th St
New York, NY 10032-3724
Phone: (212) 305-5402
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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 155074-1 (NY)
Ophthalmology Physician Taxonomy 207W00000X · Licence 155074 (NY)

Record details

NPI number1821010307
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 24, 2006
Last updated in NPPESNovember 15, 2021
Certification dateNovember 15, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1977 (49 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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