Leslie S. Kean, MD/PHD
Pediatric Hematology & Oncology Physician · Boston, MA
Leslie S. Kean, MD/PHD is a pediatric hematology & oncology physician with a practice address in Boston, Massachusetts, and NPI 1528140258, issued on Oct 20, 2006. Check the license (Massachusetts 277402, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Leslie S. Kean
- Credential
- MD/PHD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License numbers
- 277402 MA
052471 GA
MD60358703 WA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Longwood Ave, Boston, MA 02115
- Phone
- (617) 355-6000
- Enumerated
- Oct 20, 2006
- Record last updated
- Jan 7, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 197 in Massachusetts → Look up another NPI →
Also registered at 300 Longwood Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nadia Abdulrazak, N.P.Adult Health Nurse Practitioner1952616682
- Dhatri AbeyaratneStudent in an Organized Health Care Education/Training Program1437098233
Verify Leslie S. Kean in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 277402Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $8,194.58
4 payments; by number, the most common kind was food and beverage; the largest payer was Vertex Pharmaceuticals Incorporated. The 1,215 providers of this specialty with any payment received $7,404.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Leslie S. Kean among 197 pediatric hematology & oncology physician records in Massachusetts
Leslie S. Kean, MD/PHD 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 fileNo · 28% of these records are
- 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
- Elly Barry, MDBoston, MA 021151740257427
- Susan Chi, MDBoston, MA 021151154398964
- Alan Dandrea, MDBoston, MA 021151174599930
- Kimberly Davies, MDBoston, MA 021151487621199
- Holcombe Grier, MDBoston, MA 021151295702793
- Andrew Kung, MD PHDBoston, MA 021151720053580
- Jennifer Mack, MD MPHBoston, MA 021151225006398
- Alan Michelson, M.D.Boston, MA 021151760464994
Common questions
What is Leslie S. Kean, MD/PHD's NPI number?
Leslie S. Kean, MD/PHD's National Provider Identifier (NPI) is 1528140258, issued on Oct 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leslie S. Kean, MD/PHD located?
The NPPES record lists a practice address at 300 Longwood Ave, Boston, MA, 02115. Phone: (617) 355-6000. Providers update this record themselves, so call before visiting.
How can I verify Leslie S. Kean, MD/PHD's license?
NPPES lists Massachusetts license number 277402, 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.