Jeffrey Olejnik, MD
Obstetrics & Gynecology Physician · Jacksonville, IL
Jeffrey Olejnik, MD is an obstetrics & gynecology physician with a practice address in Jacksonville, Illinois, and NPI 1598727620, issued on Apr 4, 2006. Check the license (Illinois 036090909, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jeffrey Olejnik
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036090909 IL
Self-reported in NPPES; status is on the state search - Practice location
- 610 N Westgate Ave, Jacksonville, IL 62650
- Phone
- (217) 243-8455
- Enumerated
- Apr 4, 2006
- Entity
- Type 1 · individual
Also registered at 610 N Westgate Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Caitlen Despain, FNP-BCObstetrics & Gynecology Nurse Practitioner1588186084
- Tracy Hendricks, M.D.Family Medicine Physician1619993565
- Alexander Hrynewych, MDObstetrics & Gynecology Physician1780726430
- Laura Naughton, MDObstetrics & Gynecology Physician1306376496
Verify Jeffrey Olejnik 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 036090909Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
45% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
272 Medicare Part D claims for 89 beneficiaries, against an average of 188 among the 27,363 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Estradiol63 claims
- Alendronate Sodium29 claims
- Oxybutynin Chloride Er12 claims
- Triamcinolone Acetonide12 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 or facility affiliation
- Siu Physicians And Surgeons IncJacksonville, IL
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
5 obstetrics & gynecology physician records list a Jacksonville practice address
They are 5 of the 315 NPPES records with a Jacksonville practice address, and 1,983 obstetrics & gynecology physician records in Illinois.
All 5 in Jacksonville → All 1,983 in Illinois → Every provider in Jacksonville →
Other obstetrics & gynecology physician records in Illinois
- Anum Abbasi, MDChicago, IL1679063010
- Rana Abdul-Khalek, MDRoscoe, IL1275768087
- Idries Abdur-Rahman, M.D.Ottawa, IL1891727236
- Jamil Abdur-Rahman, M.D.Gurnee, IL1710914189
- Greta Abel, PA-CWheaton, IL1174844096
- Ashley Abraham, M.D.Arlington Heights, IL1457615742
- Iris Abrahantes Morales, MDChicago, IL1164155164
- Fidel Abrego, MDChicago, IL1245351824
- Bayan AbunarAurora, IL1972063220
- Sara AbuzahraChicago, IL1952105066
Common questions
What is Jeffrey Olejnik, MD's NPI number?
Jeffrey Olejnik, MD's National Provider Identifier (NPI) is 1598727620, issued on Apr 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jeffrey Olejnik, MD located?
The NPPES record lists a practice address at 610 N Westgate Ave, Jacksonville, IL, 62650. Phone: (217) 243-8455. Providers update this record themselves, so call before visiting.
How can I verify Jeffrey Olejnik, MD's license?
NPPES lists Illinois license number 036090909, 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 Jeffrey Olejnik, MD prescribe under Medicare Part D?
In 2024, Jeffrey Olejnik, MD had 272 Medicare Part D claims for 89 beneficiaries; the average among obstetrics & gynecology physician prescribers was 188. 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.