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- 12850 S Ashland Ave, Calumet Park, IL 60827
About William Sideras
William Sideras, PA-C is a physician assistant based in Calumet Park, IL. William is a 2019 graduate of Southern Illinois University School of Medicine. According to Medicare claims data, William cared for 239 Medicare patients across 279 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, detection test by immunoassay with direct visual observation for influenza virus, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more. The provider's National Provider Identifier (NPI) is 1700429040.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (630) 581-5372
- Email not available
Practice Locations
12850 S ASHLAND AVE
Calumet Park, IL 60827
Procedures Most Often Billed to Medicare
279 services · 239 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
60 | As often as other peers in Physician Assistant |
| Detection test by immunoassay with direct visual observation for influenza virus | Lab test | 87804 |
60 | More often than most peers in Physician Assistant |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
39 | As often as other peers in Physician Assistant |
| Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | Lab test | 87811 |
39 | More often than most peers in Physician Assistant |
| Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) | Lab test | 87880 |
29 | More often than most peers in Physician Assistant |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
26 | As often as other peers in Physician Assistant |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
13 | Less often than most peers in Physician Assistant |
| Urinalysis, manual test | Lab test | 81002 |
13 | Less often than most peers in Physician Assistant |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 1
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Southern Illinois University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 7 related providers in 1 group
Class of 2019 at Southern Illinois University School of Medicine 7
Providers who graduated from the same medical school in the same year.
Common questions
What is William Sideras's specialty?
William Sideras is a physician assistant in Calumet Park, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find William Sideras?
William Sideras is listed at 12850 S Ashland Ave, Calumet Park, IL 60827. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact William Sideras?
The number on file is (630) 581-5372. Contact the office directly to confirm availability and scheduling.
NPI registry
What is William Sideras's NPI number?
William Sideras's National Provider Identifier is 1700429040. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is William Sideras's education?
William Sideras attended Southern Illinois University School of Medicine, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How long has William Sideras been practicing?
William Sideras has 7 years experience. Calculated from a graduation year of 2019, reported in the CMS National Downloadable File.
CMS public data
What is William Sideras known for?
According to Medicare billing data, William Sideras the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has William Sideras confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by William Sideras. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.