TIMOTHY WILLIAMS MD
NPI 1275027419
Anesthesiology in Ann Arbor, MI
About Timothy Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY WILLIAMS MD (NPI 1275027419) is an individual anesthesiology provider in Ann Arbor, Michigan, licensed in Texas (T5494) and active in the NPI registry since June 2018. He is enrolled in Medicare PECOS, is affiliated with Baylor Scott & White Medical Center- Waxahachie, and is a graduate of University Of Texas Southwestern Medical School At Dallas (2018).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Timothy Williams Md 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.
Medicare Billing Reassignments
3Medicare enrollment records show Timothy Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Heath, TX 75032
- Reassigned Medicare billing, Texas enrollment
- 3,167 clinicians in this Medicare group
Waxahachie, TX 75165
- Reassigned Medicare billing, Texas enrollment
- 234 clinicians in this Medicare group
Houston, TX 77042
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: U S Anesthesia Partners Of Texas, PA
- 3,804 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Baylor Scott & White Medical Center- Waxahachie
Acute Care Hospitals · Waxahachie, TXBaylor Scott & White Heart & Vascular Hospital - Dallas
Acute Care Hospitals · Dallas, TXOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
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 Timothy Williams's NPI number?
The NPI number for Timothy Williams is 1275027419. It was assigned to this individual provider in the NPPES registry on June 20, 2018.
Where is Timothy Williams located?
Timothy Williams practices at 1500 E. Medical Center Drive, Ann Arbor, MI 48109. The listed phone number is (734) 936-4280.
What is Timothy Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Timothy Williams enrolled in Medicare?
Yes. Timothy Williams 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.
Which organizations bill Medicare for Timothy Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Williams reassigns Medicare benefits to 3 organizations: Healthtexas Provider Network (Heath, TX), Ntx Anesthesiology Consultants PLLC (Waxahachie, TX) and U. S. Anesthesia Partners Of Texas, P.A., (Houston, TX). Each 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 Timothy Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Williams accept?
Health plans from Blue Cross and Blue Shield of Texas and Molina Healthcare list Timothy 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.
Is Timothy Williams affiliated with any hospitals?
According to CMS data, Timothy Williams is affiliated with Baylor Scott & White Medical Center- Waxahachie and Baylor Scott & White Heart & Vascular Hospital - Dallas.
When was this NPI record last updated?
The NPPES record for Timothy Williams was last updated on March 3, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Timothy Williams, MD · NPI 1275027419
Anesthesiology physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since June 20, 2018.
## Identity
- **NPI:** 1275027419 (Entity type: Individual)
- **Enumerated:** June 20, 2018
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** T5494 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 E. MEDICAL CENTER DRIVE, Ann Arbor, MI 48109-5048
- **Phone:** (734) 936-4280
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Healthtexas Provider Network (NPI 1538164116, Heath, TX); Ntx Anesthesiology Consultants PLLC (NPI 1912410739, Waxahachie, TX); U. S. Anesthesia Partners Of Texas, P.A., (NPI 1548208564, Houston, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Southwestern Medical School At Dallas, class of 2018
## Record status
- **NPPES last updated:** March 3, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1275027419) · Data from the CMS NPPES public registry.