Mary Kathleen O'Keeffe, M.D.
Hematology & Oncology Physician · Mineola, NY
Mary Kathleen O'Keeffe, M.D. is a hematology & oncology physician with a practice address in Mineola, New York, and NPI 1881945541, issued on Sep 20, 2012. Check the license (New York 266834, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mary Kathleen O'Keeffe
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 266834 NY
Self-reported in NPPES; status is on the state search - Practice location
- 200 Old Country RD, Mineola, NY 11501
- Phone
- (516) 663-9500
- Enumerated
- Sep 20, 2012
- Record last updated
- Mar 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (516) 663-4613
- Medicare enrollment
- Enrolled (PECOS I20121101000074); 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 200 Old Country RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Joan Aiello, NPAdult Health Nurse Practitioner1457359341
- Karin Antaky, NPFamily Nurse Practitioner1760628234
- Jennifer Barocas, NPNurse Practitioner1750583878
- Katherine BeltraniAdult Health Nurse Practitioner1770975641
- Andressa Borges, MDCardiovascular Disease Physician1588699243
Verify Mary Kathleen O'Keeffe 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 266834Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,083 Medicare Part D claims for 181 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims. 20 claims were for opioids.
Most prescribed
- Xtandi182 claims
- Prednisone116 claims
- Abiraterone Acetate76 claims
- Cabometyx72 claims
- Nubeqa63 claims
- Orgovyx56 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $15.97
1 payment: food and beverage; the largest payer was Daiichi Sankyo Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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.
Bills Medicare through one group practice
- New York UniversityNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Kathleen O'Keeffe among 1,163 hematology & oncology physician records in New York
Mary Kathleen O'Keeffe, 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 2012, is newer than 73% of them.
- NPI issued2012 · 73% of these records are older, 25% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2006 · median 2002 among the 833 with a school on file
- Record last updated2021 · 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 Mineola → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Ashrei Bayewitz, MDMineola, NY 115011578826640
- Haley BealeMineola, NY 115011477418671
- Marc Braunstein, M.D., PH.D.Mineola, NY 115011568761336
- Nina D'Abreo, M.D.Mineola, NY 115011518120278
- Michael Garrison, M.D.Mineola, NY 115011003869447
- Alexander Hindenburg, M.D.Mineola, NY 115011285684175
- Jeffrey Schneider, M.D.Mineola, NY 115011447201405
- Harry Staszewski, M.D.Mineola, NY 115011366495509
Common questions
What is Mary Kathleen O'Keeffe, M.D.'s NPI number?
Mary Kathleen O'Keeffe, M.D.'s National Provider Identifier (NPI) is 1881945541, issued on Sep 20, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Mary Kathleen O'Keeffe, M.D. located?
The NPPES record lists a practice address at 200 Old Country RD, Mineola, NY, 11501. Phone: (516) 663-9500. Providers update this record themselves, so call before visiting.
How can I verify Mary Kathleen O'Keeffe, M.D.'s license?
NPPES lists New York license number 266834, 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 Mary Kathleen O'Keeffe, M.D. prescribe under Medicare Part D?
In 2024, Mary Kathleen O'Keeffe, M.D. had 1,083 Medicare Part D claims for 181 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Mary Kathleen O'Keeffe, M.D.'s MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.