John T. Horan, MD MPH
Pediatric Hematology & Oncology Physician · Boston, MA
John T. Horan, MD MPH is a pediatric hematology & oncology physician with a practice address in Boston, Massachusetts, and NPI 1649224502, issued on May 22, 2006. Check the license (Massachusetts 253620, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John T. Horan
- Credential
- MD MPH
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License number
- 253620 MA
Self-reported in NPPES; status is on the state search - Practice location
- 450 Brookline Avenue, Boston, MA 02215
- Phone
- (617) 632-3270
- Enumerated
- May 22, 2006
- Record last updated
- Aug 1, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (617) 632-4410
- Medicare enrollment
- Enrolled (PECOS I20140523000487); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 1993
- Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 197 in Massachusetts → Look up another NPI →
Also registered at 450 Brookline Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Aziz, M.DHematology (Internal Medicine) Physician1376232215
- Yoav Binenbaum, MD, PHDPediatric Hematology & Oncology Physician1720615511
- Mackenzie BoedickerMedical Physician Assistant1114608940
- Khanh Do, M.D.Medical Oncology Physician1235304429
- Jennifer Guglia, MS, NP-CAdult Health Nurse Practitioner1396133435
- William Haining, MDPediatric Hematology & Oncology Physician1235192758
Verify John T. Horan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 253620Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- University OF RochesterRochester, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John T. Horan among 197 pediatric hematology & oncology physician records in Massachusetts
John T. Horan, MD MPH is one of 197 pediatric hematology & oncology physician records with a practice address in Massachusetts. 42% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 58% newer
- In a Medicare fileYes · 42% of these records are
- In the CMS Doctors and Clinicians fileYes · 28% of these records are
- Graduated1993 · median 2007 among the 55 with a school on file
- Record last updated2019 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0207X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Hematology & Oncology Physician providers in Massachusetts
There are 197 pediatric hematology & oncology physician records in Massachusetts.
All 197 in Massachusetts → Every provider in Boston → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Natasha Archer, MDBoston, MA 022151346376779
- Steven Dubois, M.D.Boston, MA 022151992746911
- Rani George, MD PHDBoston, MA 022151346217932
- William Haining, MDBoston, MA 022151235192758
- Amy Keating, MDBoston, MA 022151447335195
- Elizabeth Mullen, MD, FAAPBoston, MA 022151376511477
- Yana Pikman, MDBoston, MA 022151669659116
- Jessica Pollard, MDBoston, MA 022151467491555
Common questions
What is John T. Horan, MD MPH's NPI number?
John T. Horan, MD MPH's National Provider Identifier (NPI) is 1649224502, issued on May 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John T. Horan, MD MPH located?
The NPPES record lists a practice address at 450 Brookline Avenue, Boston, MA, 02215. Phone: (617) 632-3270. Providers update this record themselves, so call before visiting.
How can I verify John T. Horan, MD MPH's license?
NPPES lists Massachusetts license number 253620, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.