REBECCA WILLIAMSON DO
NPI 1144857590
Obstetrics & Gynecology in Naperville, IL

Active since March 25, 2020PECOS EnrolledAccepts Medicare Assignment
100 SPALDING DR STE 406, NAPERVILLE, IL 60540(630) 961-9485 Get Directions Write a Review

NPPES record last updated: September 2, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Sep 2, 2024, Mar 25, 2020 (2 updates tracked since 2020).

About Rebecca Williamson Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

REBECCA WILLIAMSON DO (NPI 1144857590) is an individual obstetrics & gynecology provider in Naperville, Illinois, licensed in Illinois (036171498) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS, is affiliated with Edward Hospital, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1144857590
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameREBECCA WILLIAMSONCredential: DO
Location Address100 SPALDING DR STE 406Naperville, IL 60540-6554
Mailing Address100 Spalding Dr Ste 406Naperville, IL 60540-6554 · (630) 961-9485
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 25, 2020
Last NPPES UpdateSeptember 2, 20242 updates tracked since enumeration
NPPES CertifiedSeptember 2, 2024
NPI 1144857590 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License Licensed in IL · 036171498
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
100 SPALDING DR STE 406, Naperville, IL 60540

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Rebecca Williamson Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3870032006
PECOS Enrollment IDI20240830003074
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Edward Hospital

Acute Care Hospitals · Naperville, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140231
Location801 South WashingtonNaperville, IL 60540 · Du Page County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60540 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
Established Patient
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Obstetrics & Gynecology
100 SPALDING DR STE 406
NAPERVILLE, IL 60540
Nurse Practitioner
100 SPALDING DR STE 406
NAPERVILLE, IL 60540
Obstetrics & Gynecology
100 SPALDING DR STE 406
NAPERVILLE, IL 60540
Obstetrics & Gynecology
100 SPALDING DR STE 406
NAPERVILLE, IL 60540
Obstetrics & Gynecology
100 SPALDING DR STE 406
NAPERVILLE, IL 60540
Obstetrics & Gynecology
100 SPALDING DR STE 406
NAPERVILLE, IL 60540
Obstetrics & Gynecology
100 SPALDING DR STE 406
NAPERVILLE, IL 60540
Obstetrics & Gynecology
100 SPALDING DR STE 406
NAPERVILLE, IL 60540

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Rebecca Williamson's NPI number?

The NPI number for Rebecca Williamson is 1144857590. It was assigned to this individual provider in the NPPES registry on March 25, 2020.

Where is Rebecca Williamson located?

Rebecca Williamson practices at 100 Spalding Dr Ste 406, Naperville, IL 60540. The listed phone number is (630) 961-9485.

What is Rebecca Williamson's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Rebecca Williamson enrolled in Medicare?

Yes. Rebecca Williamson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Rebecca Williamson accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Rebecca Williamson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Rebecca Williamson affiliated with any hospitals?

According to CMS data, Rebecca Williamson is affiliated with Edward Hospital.

When was this NPI record last updated?

The NPPES record for Rebecca Williamson was last updated on September 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.