Jennah Lahood Siwak, M.D.
Family Medicine Physician · Metamora, IL
Jennah Lahood Siwak, M.D. is a family medicine physician with a practice address in Metamora, Illinois, and NPI 1205220597, issued on Mar 24, 2015. Check the license (Illinois 036146355, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jennah Lahood Siwak
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036146355 IL
Self-reported in NPPES; status is on the state search - Practice location
- 901 W Walnut St, Metamora, IL 61548
- Phone
- (309) 367-4144
- Enumerated
- Mar 24, 2015
- Record last updated
- Nov 4, 2024
- Medicare enrollment
- Enrolled (PECOS I20180910000050); accepts Medicare assignment
- Medical or professional school
- Illinois Medical College, 2015
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 901 W Walnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ellyn Prescher, NPFamily Nurse Practitioner1801268081
- Leah Stewart, APRN, FNP-CFamily Nurse Practitioner1164922522
- Denice Studer, FNPNurse Practitioner1144270471
- Timothy Williams, M.D.Family Medicine Physician1508893595
Verify Jennah Lahood Siwak 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 036146355Check 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% more Medicare Part D claims than the average family medicine physician in 2024
6,219 Medicare Part D claims for 462 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 171 claims were for opioids.
Most prescribed
- Atorvastatin Calcium322 claims
- Levothyroxine Sodium281 claims
- Lisinopril229 claims
- Omeprazole196 claims
- Losartan Potassium183 claims
- Amlodipine Besylate181 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 3 group practices
- Carle Health Care IncorporatedPeoria, IL
- Methodist Medical Center OF IllinoisMorton, IL
- Proctor Health SystemsPeoria, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennah Lahood Siwak among 6,215 family medicine physician records in Illinois
Jennah Lahood Siwak, M.D. 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 2015, is newer than 68% of them.
- NPI issued2015 · 68% of these records are older, 30% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2015 · median 2006 among the 3,714 with a school on file
- Record last updated2024 · 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).
4 family medicine physician records list a practice address in Metamora
They are 4 of the 53 NPPES records with a practice address in Metamora, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Metamora → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Stephanie Lindstrom, MDMetamora, IL 615481811903073
- Michael Whitford, MDMetamora, IL 615481164439980
- Timothy Williams, M.D.Metamora, IL 615481508893595
- Kimberly Ford, D.O.Morton, IL 615501275724866
- Angela Golby, DOMorton, IL 615501639183536
- Ronald Hake, MDMorton, IL 615501518971977
- Stanley Koch, MDMorton, IL 615501467436436
- Henry Martin-Del-CampoMorton, IL 615501457441743
Common questions
What is Jennah Lahood Siwak, M.D.'s NPI number?
Jennah Lahood Siwak, M.D.'s National Provider Identifier (NPI) is 1205220597, issued on Mar 24, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Jennah Lahood Siwak, M.D. located?
The NPPES record lists a practice address at 901 W Walnut St, Metamora, IL, 61548. Phone: (309) 367-4144. Providers update this record themselves, so call before visiting.
How can I verify Jennah Lahood Siwak, M.D.'s license?
NPPES lists Illinois license number 036146355, 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 Jennah Lahood Siwak, M.D. prescribe under Medicare Part D?
In 2024, Jennah Lahood Siwak, M.D. had 6,219 Medicare Part D claims for 462 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.