John Letterio, MD
NPI 1467589739 · Pediatric Hematology & Oncology Physician · Cleveland, OH
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Letterio, MD is a Pediatric Hematology & Oncology Physician provider in Cleveland, OH (NPI 1467589739).
Provider details
- NPI number
- 1467589739
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35-089599 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-27
- Last updated
- 2011-11-29
Frequently asked questions
- What is John Letterio's NPI number?
- John Letterio's National Provider Identifier (NPI) is 1467589739, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Letterio's specialty?
- John Letterio is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Letterio located?
- John Letterio's practice location on file with NPPES is 11100 Euclid Ave, Cleveland, OH 44106-1716.
- What is John Letterio's phone number?
- The practice phone number listed in the NPPES registry for John Letterio is (216) 844-7700.
- Does John Letterio accept Medicare?
- John Letterio is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Letterio's NPI active?
- Yes — John Letterio's NPI (1467589739) is active in the NPPES registry as of the last update on 2011-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.