CARLA M WILLIAMS M.D.
NPI 1235266503
Obstetrics & Gynecology in Eau Claire, WI
About Carla M Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CARLA M WILLIAMS M.D. (NPI 1235266503) is an individual obstetrics & gynecology provider in Eau Claire, Wisconsin, licensed in Wisconsin (53569-20) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and maintains a secondary practice location in Yakima.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Carla M Williams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Carla Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Eau Claire, WI 54701
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1740239557 (Wisconsin)
- 1,248 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54703 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Carla Williams's NPI number?
The NPI number for Carla Williams is 1235266503. It was assigned to this individual provider in the NPPES registry on February 27, 2007.
Where is Carla Williams located?
Carla Williams practices at 1400 Bellinger St, Eau Claire, WI 54703. The listed phone number is (715) 838-5222.
What is Carla Williams's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Carla Williams enrolled in Medicare?
Yes. Carla Williams is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Carla Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carla Williams reassigns Medicare benefits to Mayo Clinic Health System-Northwest Wisconsin Region, Inc. (Eau Claire, WI). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Carla Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Carla Williams accept?
Health plans from Security Health Plan list Carla Williams 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.
When was this NPI record last updated?
The NPPES record for Carla Williams was last updated on December 4, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.
# Carla M Williams, M.D. · NPI 1235266503
Obstetrics & Gynecology physician in Eau Claire, Wisconsin. Individual provider, active in the CMS NPPES registry since February 27, 2007.
## Identity
- **NPI:** 1235266503 (Entity type: Individual)
- **Enumerated:** February 27, 2007
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 53569-20 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1400 BELLINGER ST, Eau Claire, WI 54703
- **Phone:** (715) 838-5222
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mayo Clinic Health System-Northwest Wisconsin Region, Inc. (NPI 1235588831, Eau Claire, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 4, 2020
---
Source: [NPI Profile](https://npiprofile.com/npi/1235266503) · Data from the CMS NPPES public registry.