Alexander S. O'Hara, MD
Hematology & Oncology Physician · Maywood, IL
Alexander S. O'Hara, MD is a hematology & oncology physician with a practice address in Maywood, Illinois, and NPI 1740922533, issued on Apr 11, 2022. Check the license (Illinois 1740922533, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alexander S. O'Hara
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 1740922533 IL
125.081283 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2160 S 1St Ave, Maywood, IL 60153
- Phone
- (708) 216-7766
- Enumerated
- Apr 11, 2022
- Record last updated
- Apr 19, 2026
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →
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Verify Alexander S. O'Hara 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 1740922533Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
93 Medicare Part D claims for 30 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
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.
Alexander S. O'Hara among 666 hematology & oncology physician records in Illinois
Alexander S. O'Hara, 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 2022, is newer than 96% of them.
- NPI issued2022 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2026 · 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
- Joseph Clark, MDMaywood, IL 601531972580843
- Ellen Gaynor, MDMaywood, IL 601531225015589
- Mohamad Khair Khasawneh, MDMaywood, IL 601531467403006
- Stanley Kim, MDMaywood, IL 601531306940705
Common questions
What is Alexander S. O'Hara, MD's NPI number?
Alexander S. O'Hara, MD's National Provider Identifier (NPI) is 1740922533, issued on Apr 11, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Alexander S. O'Hara, MD located?
The NPPES record lists a practice address at 2160 S 1St Ave, Maywood, IL, 60153. Phone: (708) 216-7766. Providers update this record themselves, so call before visiting.
How can I verify Alexander S. O'Hara, MD's license?
NPPES lists Illinois license number 1740922533, 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 Alexander S. O'Hara, MD prescribe under Medicare Part D?
In 2024, Alexander S. O'Hara, MD had 93 Medicare Part D claims for 30 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.