Timothy Siebach, MD
Family Medicine Physician · Orland Park, IL
Timothy Siebach, MD is a family medicine physician with a practice address in Orland Park, Illinois, and NPI 1356920565, issued on Apr 5, 2021. Check the license (Illinois 036.171945, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Timothy Siebach
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036.171945 IL
Self-reported in NPPES; status is on the state search - Practice location
- 9550 W 167TH St, Orland Park, IL 60467
- Phone
- (708) 873-4500
- Enumerated
- Apr 5, 2021
- Record last updated
- Jan 13, 2025
- Fax
- (708) 679-5354
- Medicare enrollment
- Enrolled (PECOS I20241231000220); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 9550 W 167TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Timothy Siebach 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 036.171945Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average family medicine physician in 2024
250 Medicare Part D claims for 41 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium30 claims
- Lisinopril21 claims
- Amlodipine Besylate15 claims
- Jardiance14 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.
Bills Medicare through one group practice
- Advocate Health And Hospitals CorporationTinley Park, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Siebach among 6,215 family medicine physician records in Illinois
Timothy Siebach, MD is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 84% of them.
- NPI issued2021 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · median 2006 among the 3,714 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
58 family medicine physician records list a practice address in Orland Park
They are 58 of the 1,925 NPPES records with a practice address in Orland Park, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Orland Park → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Joseph Chan, D.O.Orland Park, IL 604671558396978
- Sachin Dixit, MDOrland Park, IL 604671922202456
- Richard Geiger, D.O.Orland Park, IL 604671508976747
- Donald Gerry, D.O.Orland Park, IL 604671154369395
- Jannette Klepek, DOOrland Park, IL 604671881673952
- Susan Marcotte, D.O.Orland Park, IL 604671184678377
- Mark McKeigue, DOOrland Park, IL 604671962480657
- Lisa Montelpasse, M.D.Orland Park, IL 604671487769436
Common questions
What is Timothy Siebach, MD's NPI number?
Timothy Siebach, MD's National Provider Identifier (NPI) is 1356920565, issued on Apr 5, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Siebach, MD located?
The NPPES record lists a practice address at 9550 W 167TH St, Orland Park, IL, 60467. Phone: (708) 873-4500. Providers update this record themselves, so call before visiting.
How can I verify Timothy Siebach, MD's license?
NPPES lists Illinois license number 036.171945, 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 Timothy Siebach, MD prescribe under Medicare Part D?
In 2024, Timothy Siebach, MD had 250 Medicare Part D claims for 41 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.