Katherine M. Williams, MD
Obstetrics & Gynecology Physician · Skokie, IL
Katherine M. Williams, MD is an obstetrics & gynecology physician with a practice address in Skokie, Illinois, and NPI 1396242053, issued on Apr 10, 2018. Check the license (Illinois 036.162289, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Katherine M. Williams
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036.162289 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4905 Old Orchard Ctr Ste 200, Skokie, IL 60077
- Phone
- (847) 499-2648
- Enumerated
- Apr 10, 2018
- Record last updated
- Oct 25, 2022
- Medicare enrollment
- Enrolled (PECOS I20221021001594); accepts Medicare assignment
- Medical or professional school
- Oakland Univ, William Beaumont School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 4905 Old Orchard Ctr Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cheryl Axelrod, M.D.Obstetrics & Gynecology Physician1801069455
- Kristin Bennett, D.O.Obstetrics & Gynecology Physician1548421621
- Claudia Del Busto, MDObstetrics & Gynecology Physician1922328699
- Dorothy Hakimian, DOObstetrics & Gynecology Physician1710515549
- Linda HoltObstetrics & Gynecology Physician1659348605
- Marion Jelcz, M.D.Obstetrics & Gynecology Physician1720070170
Verify Katherine M. Williams 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 036.162289Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
131 Medicare Part D claims for 48 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol42 claims
- Progesterone17 claims
- Valacyclovir12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 75.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $348.56
16 payments; by number, the most common kind was food and beverage; the largest payer was Mayne Pharma Commercial LLC. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Midwest Center For Women's Healthcare, LtdSkokie, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine M. Williams among 2,062 obstetrics & gynecology physician records in Illinois
Katherine M. Williams, MD 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 2018, is newer than 79% of them.
- NPI issued2018 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2018 · median 2006 among the 1,168 with a school on file
- Record last updated2022 · 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).
29 obstetrics & gynecology physician records list a practice address in Skokie
They are 29 of the 2,210 NPPES records with a practice address in Skokie, and 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Skokie → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Elizabeth Chung, M.D.Skokie, IL 600771306805593
- Judith Cothran, MDSkokie, IL 600771942263090
- Armin Drachler, MDSkokie, IL 600771538188628
- Emmet Hirsch, MDSkokie, IL 600771760404982
- Linda HoltSkokie, IL 600771659348605
- Marion Jelcz, M.D.Skokie, IL 600771720070170
- Janice Johnson, MDSkokie, IL 600771285640425
- Marcia Krause, MDSkokie, IL 600771225005275
Common questions
What is Katherine M. Williams, MD's NPI number?
Katherine M. Williams, MD's National Provider Identifier (NPI) is 1396242053, issued on Apr 10, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Katherine M. Williams, MD located?
The NPPES record lists a practice address at 4905 Old Orchard Ctr Ste 200, Skokie, IL, 60077. Phone: (847) 499-2648. Providers update this record themselves, so call before visiting.
How can I verify Katherine M. Williams, MD's license?
NPPES lists Illinois license number 036.162289, 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 M. Williams, MD prescribe under Medicare Part D?
In 2024, Katherine M. Williams, MD had 131 Medicare Part D claims for 48 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Katherine M. Williams, MD's MIPS final score?
The 2023 MIPS final score is 75.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.