Jaroslaw Maciejewski, MD
Hematology (Internal Medicine) Physician · Cleveland, OH
Jaroslaw Maciejewski, MD is a hematology (internal medicine) physician with a practice address in Cleveland, Ohio, and NPI 1831299908, issued on Sep 25, 2006. Check the license (Ohio 35080280, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Jaroslaw Maciejewski
- Credential
- MD
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 35080280 OH
Self-reported in NPPES; status is on the state search - Practice location
- 9500 Euclid Ave, Cleveland, OH 44195
- Phone
- (800) 223-2273
- Enumerated
- Sep 25, 2006
- Entity
- Type 1 · individual
Also registered at 9500 Euclid Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cassandra Abbatemarco, CNPPsychiatric/Mental Health Nurse Practitioner1417645144
- Walid Abboud, MDInternal Medicine Physician1245295559
Verify Jaroslaw Maciejewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35080280Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
72% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
137 Medicare Part D claims for 20 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. Brand-name drugs were 61% of claims.
Most prescribed
- Fabhalta56 claims
- Empaveli12 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.
Industry payments in 2024: $27,111.47
29 payments, mostly food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 721 providers of this specialty with any payment received $13,778.35 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.
One hospital affiliation
- Cleveland ClinicCleveland, OH · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Hematology (Internal Medicine) Physician providers in Ohio
There are 89 hematology (internal medicine) physician records in Ohio.
Other hematology (internal medicine) physician records in Ohio
- Anjali Advani, M.D.Cleveland, OH1942262738
- Lapo Alinari, M.D., PHDColumbus, OH1356634455
- Aseel Alsouqi, MDColumbus, OH1366931602
- Roberta Azbell, MDColumbus, OH1174054431
- Robert Baiocchi, M.D.Columbus, OH1770599755
- Amneet Bajwa, MDColumbus, OH1427554013
- Sophia Balderman, MDCleveland, OH1104098607
- Kyle Beckwith, MDCincinnati, OH1932604519
- Gregory Behbehani, M.D., PH.D.Columbus, OH1053679217
- Marina Beltrami Moreira, MD, PHDColumbus, OH1699127373
Common questions
What is Jaroslaw Maciejewski, MD's NPI number?
Jaroslaw Maciejewski, MD's National Provider Identifier (NPI) is 1831299908, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jaroslaw Maciejewski, MD located?
The NPPES record lists a practice address at 9500 Euclid Ave, Cleveland, OH, 44195. Phone: (800) 223-2273. Providers update this record themselves, so call before visiting.
How can I verify Jaroslaw Maciejewski, MD's license?
NPPES lists Ohio license number 35080280, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jaroslaw Maciejewski, MD prescribe under Medicare Part D?
In 2024, Jaroslaw Maciejewski, MD had 137 Medicare Part D claims for 20 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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) 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 27, 2026.