Rebecca Williamson, DO
Obstetrics & Gynecology Physician · Naperville, IL
Rebecca Williamson, DO is an obstetrics & gynecology physician with a practice address in Naperville, Illinois, and NPI 1144857590, issued on Mar 25, 2020. Check the license (Illinois 036171498, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Rebecca Williamson
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036171498 IL
Self-reported in NPPES; status is on the state search - Practice location
- 100 Spalding Dr Ste 406, Naperville, IL 60540
- Phone
- (630) 961-9485
- Enumerated
- Mar 25, 2020
- Record last updated
- Sep 2, 2024
- Medicare enrollment
- Enrolled (PECOS I20240830003074); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 100 Spalding Dr Ste 406
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Aguiar, MDObstetrics & Gynecology Physician1679660229
- Thomas Chen, MDObstetrics & Gynecology Physician1518040401
- Brittany Conrad, APN-CNPNurse Practitioner1083133706
- Kimberly Delapp, MDObstetrics & Gynecology Physician1679990121
- Nabiha Hashmi, MDObstetrics & Gynecology Physician1528681673
- Basel Imam, M.D.Obstetrics & Gynecology Physician1245573542
Verify Rebecca Williamson 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 036171498Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $19.37
1 payment: food and beverage; the largest payer was CooperSurgical, Inc. 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
- Endeavor Health Medical GroupNaperville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rebecca Williamson among 2,062 obstetrics & gynecology physician records in Illinois
Rebecca Williamson, DO 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 2020, is newer than 85% of them.
- NPI issued2020 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2020 · median 2006 among the 1,168 with a school on file
- Record last updated2024 · 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).
Obstetrics & Gynecology Physician providers in Illinois
There are 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Naperville → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Linda AndersonNaperville, IL 605401528058195
- Andrew Badowski, MDNaperville, IL 605401104849272
- Vimi Bajaj, MD FACOGNaperville, IL 605401164488763
- Judith Bressler, M.D.Naperville, IL 605401194726547
- Michele Carney, MDNaperville, IL 605401750371340
- Michael Feingold, MDNaperville, IL 605401053366567
- Bridget Frangella, MDNaperville, IL 605401972578375
- John Josupait, MDNaperville, IL 605401972594018
Common questions
What is Rebecca Williamson, DO's NPI number?
Rebecca Williamson, DO's National Provider Identifier (NPI) is 1144857590, issued on Mar 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Rebecca Williamson, DO located?
The NPPES record lists a practice address at 100 Spalding Dr Ste 406, Naperville, IL, 60540. Phone: (630) 961-9485. Providers update this record themselves, so call before visiting.
How can I verify Rebecca Williamson, DO's license?
NPPES lists Illinois license number 036171498, 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.
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.