JOHN T HORAN MD MPH
NPI 1649224502
Pediatrics - Pediatric Hematology-Oncology in Boston, MA
About John T Horan Md Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN T HORAN MD MPH (NPI 1649224502) is an individual pediatric hematology-oncology provider in Boston, Massachusetts, licensed in Massachusetts (253620) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Rutgers New Jersey Medical School (1993).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John T Horan Md Mph is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show John Horan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rochester, NY 14620
- Reassigned Medicare billing, New York enrollment
- 1,624 clinicians in this Medicare group
Rochester, NY 14642
- Reassigned Medicare billing, New York enrollment
- 88 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 16
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Horan's NPI number?
The NPI number for John Horan is 1649224502. It was assigned to this individual provider in the NPPES registry on May 22, 2006.
Where is John Horan located?
John Horan practices at 450 Brookline Avenue, Boston, MA 02215. The listed phone number is (617) 632-3270.
What is John Horan's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.
Is John Horan enrolled in Medicare?
Yes. John Horan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Horan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Horan reassigns Medicare benefits to 2 organizations: University Of Rochester (Rochester, NY) and Pediatric Group Univ Of Rochester (Rochester, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Horan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Horan was last updated on August 1, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John T Horan, MD MPH · NPI 1649224502
Pediatric Hematology-Oncology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 22, 2006.
## Identity
- **NPI:** 1649224502 (Entity type: Individual)
- **Enumerated:** May 22, 2006
- **Primary specialty:** Pediatrics - Pediatric Hematology-Oncology · taxonomy 2080P0207X
- **State license:** 253620 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 450 BROOKLINE AVENUE, Boston, MA 02215
- **Phone:** (617) 632-3270 · **Fax:** (617) 632-4410
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): University Of Rochester (NPI 1982787537, Rochester, NY); Pediatric Group Univ Of Rochester (NPI 1083271787, Rochester, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rutgers New Jersey Medical School, class of 1993
## Record status
- **NPPES last updated:** August 1, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1649224502) · Data from the CMS NPPES public registry.