Katherine Grace Claudia Weller
Obstetrics & Gynecology Physician · Chicago, IL
Katherine Grace Claudia Weller is an obstetrics & gynecology physician with a practice address in Chicago, Illinois, and NPI 1245969013, issued on Jun 7, 2022. Check the license (Illinois 125.079876, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Katherine Grace Claudia Weller
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 125.079876 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1620 W Harrison St, Chicago, IL 60612
- Phone
- (312) 942-5000
- Enumerated
- Jun 7, 2022
- Record last updated
- Mar 1, 2026
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 1620 W Harrison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kylie Abernathy, OTOccupational Therapist1518489269
- Iris Abrahantes Morales, MDObstetrics & Gynecology Physician1164155164
- Sunaina Addanki, MDInternal Medicine Physician1396593349
- Favour AdebayoPhysical Therapist1245072081
- Adebanke Adeyemi, MDInternal Medicine Physician1922933936
- Emily Adochio-Clancy, MDInfectious Disease Physician1629606975
Verify Katherine Grace Claudia Weller 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 125.079876Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
30 Medicare Part D claims for 18 beneficiaries, against an average of 165 among the 28,733 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.
Katherine Grace Claudia Weller among 2,062 obstetrics & gynecology physician records in Illinois
Katherine Grace Claudia Weller is one of 2,062 obstetrics & gynecology physician records with a practice address in Illinois. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 90% of them.
- NPI issued2022 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
700 obstetrics & gynecology physician records list a practice address in Chicago
They are 700 of the 63,379 NPPES records with a practice address in Chicago, and 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Chicago → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Eric Brown, M.D.Chicago, IL 606121356303663
- Allison Cowett, M.D.Chicago, IL 606121639282668
- Sadia Haider, MDChicago, IL 606121033163522
- Kimberly Jezek-TischChicago, IL 606121720090269
- Robin Jones, M.D.Chicago, IL 606121942262258
- Martha KaempfeChicago, IL 606121821000142
- Andrea KempChicago, IL 606121932112927
- Edward Linn, M.D.Chicago, IL 606121730178765
Common questions
What is Katherine Grace Claudia Weller's NPI number?
Katherine Grace Claudia Weller's National Provider Identifier (NPI) is 1245969013, issued on Jun 7, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Grace Claudia Weller located?
The NPPES record lists a practice address at 1620 W Harrison St, Chicago, IL, 60612. Phone: (312) 942-5000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Grace Claudia Weller's license?
NPPES lists Illinois license number 125.079876, 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 Katherine Grace Claudia Weller prescribe under Medicare Part D?
In 2024, Katherine Grace Claudia Weller had 30 Medicare Part D claims for 18 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.