William Sideras, PA-C
Physician Assistant · Calumet Park, IL
William Sideras, PA-C is a physician assistant with a practice address in Calumet Park, Illinois, and NPI 1700429040, issued on Oct 18, 2019. Check the license (Illinois 085.007284, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Sideras
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 085.007284 IL
Self-reported in NPPES; status is on the state search - Practice location
- 12850 S Ashland Ave, Calumet Park, IL 60827
- Phone
- (630) 581-5372
- Enumerated
- Oct 18, 2019
- Record last updated
- Feb 15, 2023
- Medicare enrollment
- Enrolled (PECOS I20191031002689); accepts Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 2019
- Entity
- Type 1 · individual
Also registered at 12850 S Ashland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Caitlin Greenfield, FNP-BCNurse Practitioner1184371668
- Lonyah Guy, APRNNurse Practitioner1235969916
- Raegene Hankle, FNP-BCNurse Practitioner1902522147
- Katarzyna Para, FNP-CFamily Nurse Practitioner1851969976
Verify William Sideras in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 085.007284Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average physician assistant in 2024
211 Medicare Part D claims for 155 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Azithromycin36 claims
- Amoxicillin-Clavulanate Potass33 claims
- Cephalexin17 claims
- Prednisone13 claims
- Amoxicillin12 claims
- Doxycycline Hyclate12 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: $58.80
7 payments; by number, the most common kind was food and beverage; the largest payer was Electronic Waveform Lab, Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
Bills Medicare through one group practice
- Midwest Express Care 2, IncBlue Island, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
1 physician assistant records list a practice address in Calumet Park
They are 1 of the 32 NPPES records with a practice address in Calumet Park, and 4,926 physician assistant records in Illinois.
Other physician assistant records in Illinois
- Brooke Aarhus, PA-CPark Ridge, IL1760985469
- Sana Abbasi, PACarol Stream, IL1831803295
- Susan Abbinanti, PA-CElk Grove Village, IL1679647358
- Katheryn Abbott, PASchaumburg, IL1356842082
- Noor Abdelrahman, PA-CChicago, IL1851012413
- Amer Abdulghafoor, MSW, MS, PA-CChicago, IL1619401718
- Kazuko Abe, P.A.Chicago, IL1881840783
- Greta Abel, PA-CWheaton, IL1174844096
- Derrik AbellAnna, IL1821618471
- Jeanine Aberbook, PA-CChicago, IL1518664176
Common questions
What is William Sideras, PA-C's NPI number?
William Sideras, PA-C's National Provider Identifier (NPI) is 1700429040, issued on Oct 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is William Sideras, PA-C located?
The NPPES record lists a practice address at 12850 S Ashland Ave, Calumet Park, IL, 60827. Phone: (630) 581-5372. Providers update this record themselves, so call before visiting.
How can I verify William Sideras, PA-C's license?
NPPES lists Illinois license number 085.007284, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does William Sideras, PA-C prescribe under Medicare Part D?
In 2024, William Sideras, PA-C had 211 Medicare Part D claims for 155 beneficiaries; the average among physician assistant prescribers was 830. 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.