Don Leroy Hollandsworth, D.O.
Nephrology Physician · Olympia Fields, IL
Don Leroy Hollandsworth, D.O. is a nephrology physician with a practice address in Olympia Fields, Illinois, and NPI 1730274770, issued on Oct 4, 2006. Check the license (Illinois 036042652, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Don Leroy Hollandsworth
- Credential
- D.O.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 036042652 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4001 Vollmer RD., Olympia Fields, IL 60461
- Phone
- (708) 481-8883
- Enumerated
- Oct 4, 2006
- Record last updated
- Jun 26, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (708) 481-2917
- Medicaid ID
- 036042652 IL
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 572 in Illinois → Look up another NPI →
Also registered at 4001 Vollmer RD.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Edwin Cook, D.O.Nephrology Physician1508952011
- William Imlach, D.O.Family Medicine Physician1699850610
- Michael Olden, D.O.Endocrinology, Diabetes & Metabolism Physician1609961218
- Sushma Raghavendra, M.D.Family Medicine Physician1861612475
- Rodey Wassef, D.O.Family Medicine Physician1720178734
Verify Don Leroy Hollandsworth 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 036042652Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average nephrology physician in 2024
15 Medicare Part D claims, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Don Leroy Hollandsworth among 572 nephrology physician records in Illinois
Don Leroy Hollandsworth, D.O. is one of 572 nephrology physician records with a practice address in Illinois. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2014 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 nephrology physician records list a practice address in Olympia Fields
They are 13 of the 684 NPPES records with a practice address in Olympia Fields, and 572 nephrology physician records in Illinois.
All 572 in Illinois → Every provider in Olympia Fields → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Edwin Cook, D.O.Olympia Fields, IL 604611508952011
- Sangeet Dhillon-Jhattu, M.D.Olympia Fields, IL 604611912240797
- Chidinma Ekenna, M.D.Olympia Fields, IL 604611659750743
- Khalid Elharrif, MDOlympia Fields, IL 604611487150306
- Syed Affan Ul Haq Hashmi, MDOlympia Fields, IL 604611164787792
- Mustafa Kagalwalla, MDOlympia Fields, IL 604611093190076
- Daniel McCormick, M.D.Olympia Fields, IL 604611992720320
- Ritika Paul, M.D.Olympia Fields, IL 604611801321807
Common questions
What is Don Leroy Hollandsworth, D.O.'s NPI number?
Don Leroy Hollandsworth, D.O.'s National Provider Identifier (NPI) is 1730274770, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Don Leroy Hollandsworth, D.O. located?
The NPPES record lists a practice address at 4001 Vollmer RD., Olympia Fields, IL, 60461. Phone: (708) 481-8883. Providers update this record themselves, so call before visiting.
How can I verify Don Leroy Hollandsworth, D.O.'s license?
NPPES lists Illinois license number 036042652, 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 Don Leroy Hollandsworth, D.O. prescribe under Medicare Part D?
In 2024, Don Leroy Hollandsworth, D.O. had 15 Medicare Part D claims; the average among nephrology physician prescribers was 1,465. 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.