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

John J Letterio, MD

Individual provider Pediatric Hematology & Oncology Physician · NPI 1467589739

John J Letterio, MD is a Pediatric Hematology & Oncology Physician in Cleveland, Ohio. Licensed in Maryland and Ohio. Registered with an NPI since 2007.

Licensed in
MD, OH
In the registry since
2007
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

11100 Euclid Ave
Cleveland, OH 44106-1716
Phone: (216) 844-7700
Fax: (440) 684-5952
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Hematology & Oncology Physician (primary) Taxonomy 2080P0207X · Licence 35-089599 (OH)
Pediatric Hematology & Oncology Physician Taxonomy 2080P0207X · Licence D0039985 (MD)

Record details

NPI number1467589739
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 27, 2007
Last updated in NPPESNovember 29, 2011
Mailing address24701 Euclid Ave, 3rd Floor, Euclid, OH 44117-1714

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