Rebecca Williamson, DO
NPI 1144857590 · Obstetrics & Gynecology Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rebecca Williamson, DO is a Obstetrics & Gynecology Physician provider in Naperville, IL (NPI 1144857590).
Provider details
- NPI number
- 1144857590
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 036171498 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-03-25
- Last updated
- 2024-09-02
- Certified
- 2024-09-02
Frequently asked questions
- What is Rebecca Williamson's NPI number?
- Rebecca Williamson's National Provider Identifier (NPI) is 1144857590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rebecca Williamson's specialty?
- Rebecca Williamson is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Rebecca Williamson located?
- Rebecca Williamson's practice location on file with NPPES is 100 Spalding Dr Ste 406, Naperville, IL 60540-6554.
- What is Rebecca Williamson's phone number?
- The practice phone number listed in the NPPES registry for Rebecca Williamson is (630) 961-9485.
- Does Rebecca Williamson accept Medicare?
- Rebecca Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rebecca Williamson's NPI active?
- Yes — Rebecca Williamson's NPI (1144857590) is active in the NPPES registry as of the last update on 2024-09-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.