Sara Ruddock-Walker, M.D.
Hospitalist Physician · Winfield, IL
Sara Ruddock-Walker, M.D. is a hospitalist physician with a practice address in Winfield, Illinois, and NPI 1558711101, issued on Jun 14, 2016. Check the license (Illinois 036151710, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Sara Ruddock-Walker
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 036151710 IL
036.151710 IL
125.069373 IL
Self-reported in NPPES; status is on the state search - Practice location
- 25 N Winfield RD, Winfield, IL 60190
- Phone
- (630) 933-4700
- Enumerated
- Jun 14, 2016
- Record last updated
- Feb 18, 2026
- Fax
- (630) 933-4427
- Medicare enrollment
- Enrolled (PECOS I20200522000528); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,535 in Illinois → Look up another NPI →
Also registered at 25 N Winfield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sara Ruddock-Walker 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 036151710Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average hospitalist physician in 2024
42 Medicare Part D claims for 22 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
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 2 group practices
- Central Dupage Physician GroupWinfield, IL
- Rush University Medical GroupChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sara Ruddock-Walker among 1,535 hospitalist physician records in Illinois
Sara Ruddock-Walker, M.D. is one of 1,535 hospitalist physician records with a practice address in Illinois. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 57% of them.
- NPI issued2016 · 57% of these records are older, 37% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2016 · median 2013 among the 1,339 with a school on file
- Record last updated2026 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
74 hospitalist physician records list a practice address in Winfield
They are 74 of the 778 NPPES records with a practice address in Winfield, and 1,535 hospitalist physician records in Illinois.
All 1,535 in Illinois → Every provider in Winfield → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Anju Agarwal, DOWinfield, IL 601901952335671
- Nathan Bolden, M.D.Winfield, IL 601901124292727
- Joan Garvey, M.D.Winfield, IL 601901891989703
- Gail Gizzo-Waitley, MDWinfield, IL 601901518954270
- Patrick Gordon, MDWinfield, IL 601901538181375
- Victoria Greenfield, MDWinfield, IL 601901881801165
- John Hardek, M.D.Winfield, IL 601901710945126
- Kashif Janjua, M.D.Winfield, IL 601901558522730
Common questions
What is Sara Ruddock-Walker, M.D.'s NPI number?
Sara Ruddock-Walker, M.D.'s National Provider Identifier (NPI) is 1558711101, issued on Jun 14, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Sara Ruddock-Walker, M.D. located?
The NPPES record lists a practice address at 25 N Winfield RD, Winfield, IL, 60190. Phone: (630) 933-4700. Providers update this record themselves, so call before visiting.
How can I verify Sara Ruddock-Walker, M.D.'s license?
NPPES lists Illinois license number 036151710, 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 Sara Ruddock-Walker, M.D. prescribe under Medicare Part D?
In 2024, Sara Ruddock-Walker, M.D. had 42 Medicare Part D claims for 22 beneficiaries; the average among hospitalist physician prescribers was 521. 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.