Kathleen A. Killoran, M.D.
Hematology & Oncology Physician · Brooklyn, NY
Kathleen A. Killoran, M.D. is a hematology & oncology physician with a practice address in Brooklyn, New York, and NPI 1558551242, issued on Jul 28, 2007. Check the license (New York 265238-1, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Kathleen A. Killoran
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 265238-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 450 Clarkson Ave, Brooklyn, NY 11203
- Phone
- (718) 618-8678
- Enumerated
- Jul 28, 2007
- Record last updated
- Jul 11, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (718) 270-4328
- Medicare enrollment
- Enrolled (PECOS I20131115000949); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,163 in New York → Look up another NPI →
Also registered at 450 Clarkson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sana Abbas, DOStudent in an Organized Health Care Education/Training Program1629863212
- Rabab Abdalla, MDStudent in an Organized Health Care Education/Training Program1780325621
- Marie Abdallah, MDStudent in an Organized Health Care Education/Training Program1073743639
- Ahmed AbdelfattahStudent in an Organized Health Care Education/Training Program1508708959
- Haram AbdelmajidStudent in an Organized Health Care Education/Training Program1093348054
- Sara AbdelrahamanStudent in an Organized Health Care Education/Training Program1659143568
Verify Kathleen A. Killoran in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 265238-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
508 Medicare Part D claims for 76 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Anastrozole145 claims
- Letrozole38 claims
- Exemestane32 claims
- Ibrance24 claims
- Alendronate Sodium18 claims
- Verzenio18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Memorial Solid Tumor GroupNew York, NY
- Msk Ralph Lauren CenterNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kathleen A. Killoran among 1,163 hematology & oncology physician records in New York
Kathleen A. Killoran, M.D. is one of 1,163 hematology & oncology physician records with a practice address in New York. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 47% of them.
- NPI issued2007 · 47% of these records are older, 44% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2004 · median 2002 among the 833 with a school on file
- Record last updated2013 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in New York
There are 1,163 hematology & oncology physician records in New York.
All 1,163 in New York → Every provider in Brooklyn → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Olcay Batuman, M.D.Brooklyn, NY 112031316931579
- Jordonna BrownBrooklyn, NY 112031467985564
- Edwin ChiuBrooklyn, NY 112031104261569
- Jason Gonsky, M.D., PH.D.Brooklyn, NY 112031184835035
- Vinita Gupta, M.D.Brooklyn, NY 112031710181870
- Madhumati Kalavar, MDBrooklyn, NY 112031215991070
- Leen Khoury, MDBrooklyn, NY 112031790247922
- Mohan Preet, MDBrooklyn, NY 112031134243595
Common questions
What is Kathleen A. Killoran, M.D.'s NPI number?
Kathleen A. Killoran, M.D.'s National Provider Identifier (NPI) is 1558551242, issued on Jul 28, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Kathleen A. Killoran, M.D. located?
The NPPES record lists a practice address at 450 Clarkson Ave, Brooklyn, NY, 11203. Phone: (718) 618-8678. Providers update this record themselves, so call before visiting.
How can I verify Kathleen A. Killoran, M.D.'s license?
NPPES lists New York license number 265238-1, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kathleen A. Killoran, M.D. prescribe under Medicare Part D?
In 2024, Kathleen A. Killoran, M.D. had 508 Medicare Part D claims for 76 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
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.