Michael Joseph Breen, MD, PHD
Hematology & Oncology Physician · Libertyville, IL
Michael Joseph Breen, MD, PHD is a hematology & oncology physician with a practice address in Libertyville, Illinois, and NPI 1669861449, issued on Jan 15, 2015. Check the license (Illinois 036149848, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Michael Joseph Breen
- Credential
- MD, PHD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 036149848 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1800 Hollister Dr Ste 112, Libertyville, IL 60048
- Phone
- (847) 367-6781
- Enumerated
- Jan 15, 2015
- Record last updated
- Oct 13, 2022
- Medicare enrollment
- Enrolled (PECOS I20220909000767); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
Also registered at 1800 Hollister Dr Ste 112
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mir Ali, MDHematology & Oncology Physician1518237585
- Aalisha DesaiHematology & Oncology Physician1962816108
- Kevin Prescott, MDHematology & Oncology Physician1144713348
- Jessica Roberts, FNP-BCFamily Nurse Practitioner1851046866
- Madeline RosenbaumPhysician Assistant1821512997
- Armita Saleki-HadavandNurse Practitioner1700250651
Verify Michael Joseph Breen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036149848Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
795 Medicare Part D claims for 161 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims. 66 claims were for opioids.
Most prescribed
- Prochlorperazine Maleate97 claims
- Dexamethasone43 claims
- Ondansetron Hcl41 claims
- Eliquis38 claims
- Hydrocodone-Acetaminophen37 claims
- Prednisone36 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 one group practice
- Advocate Health And Hospitals CorporationLibertyville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Joseph Breen among 666 hematology & oncology physician records in Illinois
Michael Joseph Breen, MD, PHD is one of 666 hematology & oncology physician records with a practice address in Illinois. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 73% of them.
- NPI issued2015 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2016 · median 2003 among the 461 with a school on file
- Record last updated2022 · 49% 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 Illinois 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 Illinois
There are 666 hematology & oncology physician records in Illinois.
All 666 in Illinois → Every provider in Libertyville → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Mir Ali, MDLibertyville, IL 600481518237585
- Aalisha DesaiLibertyville, IL 600481962816108
- Kevin Prescott, MDLibertyville, IL 600481144713348
- Omar Salman, MDLibertyville, IL 600481013408939
- Amber Seba, M.D.Libertyville, IL 600481811153034
- David Slivnick, MDLibertyville, IL 600481225082761
- Bruce Gershenhorn, DOMcHenry, IL 600501588796478
- Nida Hussain, M.D.McHenry, IL 600501134562150
Common questions
What is Michael Joseph Breen, MD, PHD's NPI number?
Michael Joseph Breen, MD, PHD's National Provider Identifier (NPI) is 1669861449, issued on Jan 15, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Michael Joseph Breen, MD, PHD located?
The NPPES record lists a practice address at 1800 Hollister Dr Ste 112, Libertyville, IL, 60048. Phone: (847) 367-6781. Providers update this record themselves, so call before visiting.
How can I verify Michael Joseph Breen, MD, PHD's license?
NPPES lists Illinois license number 036149848, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Joseph Breen, MD, PHD prescribe under Medicare Part D?
In 2024, Michael Joseph Breen, MD, PHD had 795 Medicare Part D claims for 161 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.