Joseph I. Clark, MD
Hematology & Oncology Physician · Maywood, IL
Joseph I. Clark, MD is a hematology & oncology physician with a practice address in Maywood, Illinois, and NPI 1972580843, issued on Dec 30, 2005. Check the license (Illinois 36083048, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Joseph I. Clark
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 36083048 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2160 S First Ave, Maywood, IL 60153
- Phone
- (708) 216-3304
- Enumerated
- Dec 30, 2005
- Record last updated
- Jan 28, 2022
- Fax
- (708) 216-1259
- Medicaid ID
- 36083048 IL
- Medicare enrollment
- Enrolled (PECOS I20050818000188); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1989
- 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 2160 S First Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rekha Agrawal, MDPediatric Nephrology Physician1205802071
- Kathy Albain, M.D.Hematology & Oncology Physician1679550842
- Douglas Anderson, MDNeurological Surgery Physician1386621258
- Aziz Ansari, DOHospitalist Physician1558467720
Verify Joseph I. Clark 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 36083048Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,114 Medicare Part D claims for 169 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims. 60 claims were for opioids.
Most prescribed
- Levothyroxine Sodium225 claims
- Cabometyx141 claims
- Prochlorperazine Maleate80 claims
- Prednisone77 claims
- Inlyta69 claims
- Eliquis45 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.
One hospital affiliation
- Loyola University Medical CenterMaywood, IL · Acute Care Hospitals2 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.
Joseph I. Clark among 666 hematology & oncology physician records in Illinois
Joseph I. Clark, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1989 · 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).
44 hematology & oncology physician records list a practice address in Maywood
They are 44 of the 2,572 NPPES records with a practice address in Maywood, and 666 hematology & oncology physician records in Illinois.
All 666 in Illinois → Every provider in Maywood → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Kathy Albain, M.D.Maywood, IL 601531679550842
- Kevin Barton, MDMaywood, IL 601531306823679
- Leela Bhupalam, MDMaywood, IL 601531629059431
- Stanley Borowicz, M.D., M.S.Maywood, IL 601531548434723
- Ellen Gaynor, MDMaywood, IL 601531225015589
- Mohamad Khair Khasawneh, MDMaywood, IL 601531467403006
- Stanley Kim, MDMaywood, IL 601531306940705
- Shelly Lo, MDMaywood, IL 601531013994086
Common questions
What is Joseph I. Clark, MD's NPI number?
Joseph I. Clark, MD's National Provider Identifier (NPI) is 1972580843, issued on Dec 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Joseph I. Clark, MD located?
The NPPES record lists a practice address at 2160 S First Ave, Maywood, IL, 60153. Phone: (708) 216-3304. Providers update this record themselves, so call before visiting.
How can I verify Joseph I. Clark, MD's license?
NPPES lists Illinois license number 36083048, 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 Joseph I. Clark, MD prescribe under Medicare Part D?
In 2024, Joseph I. Clark, MD had 1,114 Medicare Part D claims for 169 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.