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

Dr. William Y Mejia, MD

Individual provider Internal Medicine Physician · NPI 1851539829

Dr. William Y Mejia, MD is an Internal Medicine Physician in Bronx, New York. Licensed in New York. Registered with an NPI since 2009.

Licensed in
NY
In the registry since
2009
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

391 E 149th St Ste 216
Bronx, NY 10455-3907
Phone: (718) 665-8300
Fax: (718) 665-8301
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 133211-1 (NY)

Record details

NPI number1851539829
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 29, 2009
Last updated in NPPESJanuary 29, 2009

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