DR. LESLIE S KEAN MD/PHD
NPI 1528140258
Pediatrics - Pediatric Hematology-Oncology in Boston, MA
About Dr. Leslie S Kean Md/phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LESLIE S KEAN MD/PHD (NPI 1528140258) is an individual pediatric hematology-oncology provider in Boston, Massachusetts, licensed in Massachusetts (277402) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Leslie S Kean Md/phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Leslie Kean reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 1,358 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,026 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
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 Leslie Kean's NPI number?
The NPI number for Leslie Kean is 1528140258. It was assigned to this individual provider in the NPPES registry on October 20, 2006.
Where is Leslie Kean located?
Leslie Kean practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.
What is Leslie Kean's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.
Is Leslie Kean enrolled in Medicare?
Yes. Leslie Kean is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Leslie Kean's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Kean reassigns Medicare benefits to 2 organizations: Children's Hospital Pediatric Associates, Inc (Boston, MA) and Dana-Farber Cancer Institute, Inc. (Boston, MA). 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 Leslie Kean's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Leslie Kean accept?
Health plans from Taro Health list Leslie Kean as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Leslie Kean was last updated on January 7, 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.
# Dr. Leslie S Kean, MD/PHD · NPI 1528140258
Pediatric Hematology-Oncology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since October 20, 2006.
## Identity
- **NPI:** 1528140258 (Entity type: Individual)
- **Enumerated:** October 20, 2006
- **Primary specialty:** Pediatrics - Pediatric Hematology-Oncology · taxonomy 2080P0207X
- **State license:** 277402 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE, Boston, MA 02115-5724
- **Phone:** (617) 355-6000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Children's Hospital Pediatric Associates, Inc (NPI 1457306664, Boston, MA); Dana-Farber Cancer Institute, Inc. (NPI 1851333686, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 7, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1528140258) · Data from the CMS NPPES public registry.