Mary Kathryn Schaefer, PA-C
Physician Assistant · Chicago, IL
Mary Kathryn Schaefer, PA-C is a physician assistant with a practice address in Chicago, Illinois, and NPI 1598864159, issued on Sep 21, 2006. Check the license (Illinois 085002492, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Kathryn Schaefer
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 085002492 IL
085-002492 IL
Self-reported in NPPES; status is on the state search - Practice location
- 675 N Saint Clair St Ste 21-100, Chicago, IL 60611
- Phone
- (312) 695-0990
- Enumerated
- Sep 21, 2006
- Record last updated
- Jan 17, 2022
- Fax
- (312) 695-1106
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,926 in Illinois → Look up another NPI →
Also registered at 675 N Saint Clair St Ste 21-100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Kathryn Schaefer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 085002492Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average physician assistant in 2024
37 Medicare Part D claims for 19 beneficiaries, against an average of 830 among the 101,058 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.
Mary Kathryn Schaefer among 4,926 physician assistant records in Illinois
Mary Kathryn Schaefer, PA-C is one of 4,926 physician assistant records with a practice address in Illinois. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 88% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2022 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,445 physician assistant records list a practice address in Chicago
They are 1,445 of the 63,379 NPPES records with a practice address in Chicago, and 4,926 physician assistant records in Illinois.
All 4,926 in Illinois → Every provider in Chicago → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Regina Bart, PAChicago, IL 606111083656284
- Michele Bryk, PAChicago, IL 606111316906860
- Jennifer Centore-Lober, PA CChicago, IL 606111932198322
- Karen Ferkau, P.A.Chicago, IL 606111013082809
- Jung Lee, PAChicago, IL 606111588698476
- Michael Maclean, PA-CChicago, IL 606111033139399
- Vera Nisavic, P.A.Chicago, IL 606111174696207
- Laura Nishi, PAChicago, IL 606111821040049
Common questions
What is Mary Kathryn Schaefer, PA-C's NPI number?
Mary Kathryn Schaefer, PA-C's National Provider Identifier (NPI) is 1598864159, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Kathryn Schaefer, PA-C located?
The NPPES record lists a practice address at 675 N Saint Clair St Ste 21-100, Chicago, IL, 60611. Phone: (312) 695-0990. Providers update this record themselves, so call before visiting.
How can I verify Mary Kathryn Schaefer, PA-C's license?
NPPES lists Illinois license number 085002492, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Kathryn Schaefer, PA-C prescribe under Medicare Part D?
In 2024, Mary Kathryn Schaefer, PA-C had 37 Medicare Part D claims for 19 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.