TERRI LYNN WILLIAMS MD
NPI 1720114507
Emergency Medicine in Saginaw, MI
About Terri Lynn Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TERRI LYNN WILLIAMS MD (NPI 1720114507) is an individual emergency medicine provider in Saginaw, Michigan, licensed in Michigan (4301065469) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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)
Terri Lynn Williams Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Terri Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lansing, MI 48910
- Reassigned Medicare billing, Michigan enrollment
- 295 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 48602 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 19
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
SAGINAW, MI 48602
SAGINAW, MI 48602
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 Terri Williams's NPI number?
The NPI number for Terri Williams is 1720114507. It was assigned to this individual provider in the NPPES registry on February 26, 2007.
Where is Terri Williams located?
Terri Williams practices at 1500 Weiss St, Saginaw, MI 48602. The listed phone number is (989) 497-2500.
What is Terri Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Terri Williams enrolled in Medicare?
Yes. Terri Williams is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Terri Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Terri Williams reassigns Medicare benefits to Degara App, PLLC (Lansing, MI). 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 Terri Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Terri Williams accept?
Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Terri 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 Terri Williams was last updated on March 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.