DR. WILLIAM BRENDAN HAYES MD
NPI 1760433098
Anesthesiology in Fort Worth, TX
About Dr. William Brendan Hayes Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM BRENDAN HAYES MD (NPI 1760433098) is an individual anesthesiology provider in Fort Worth, Texas, licensed in Wisconsin (56749) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Medical Center - Cedar Rapids, and is a graduate of Other (1994).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 7
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
Dr. William Brendan Hayes 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
12Medicare enrollment records show William Hayes reassigns Medicare billing to 12 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fort Worth, TX 76109
- Reassigned Medicare billing, Texas enrollment
- 1,612 clinicians in this Medicare group
Hurst, TX 76053
- Reassigned Medicare billing, Texas enrollment
- 47 clinicians in this Medicare group
Arlington, TX 76015
- Reassigned Medicare billing, Texas enrollment
- 64 clinicians in this Medicare group
Addison, TX 75001
- Reassigned Medicare billing, Florida, Missouri and Texas enrollments
- 42 clinicians in this Medicare group
Bryan, TX 77802
- Reassigned Medicare billing, Texas enrollment
- 840 clinicians in this Medicare group
Cedar Rapids, IA 52401
- Reassigned Medicare billing, Iowa enrollment
- Medicare enrollment name: Mercy Medical Center
- 387 clinicians in this Medicare group
Knoxville, TN 37916
- Reassigned Medicare billing, Tennessee enrollment
- Medicare enrollment name: American Anesthesiology Of Tennessee PC
- 959 clinicians in this Medicare group
Hilton Head Island, SC 29926
- Reassigned Medicare billing, South Carolina enrollment
- 70 clinicians in this Medicare group
Dickinson, ND 58601
- Reassigned Medicare billing, North Dakota enrollment
- Medicare enrollment name: St. Joseph's Hospital And Health Center
- Also billed through NPI 1992947956 (North Dakota)
- 401 clinicians in this Medicare group
Grand Forks, ND 58201
- Reassigned Medicare billing, North Dakota enrollment
- 701 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Medical Center - Cedar Rapids
Acute Care Hospitals · Cedar Rapids, IASt Joseph Hospital
Acute Care Hospitals · Bangor, MEGlen Rose Medical Center
Acute Care Hospitals · Glen Rose, TXUniversity Of Wi Hospitals & Clinics Authority
Acute Care Hospitals · Madison, WIFrequently 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 William Hayes's NPI number?
The NPI number for William Hayes is 1760433098. It was assigned to this individual provider in the NPPES registry on May 12, 2006.
Where is William Hayes located?
William Hayes practices at 4617 Briarhaven Rd, Fort Worth, TX 76109. The listed phone number is (817) 776-3621.
What is William Hayes's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is William Hayes enrolled in Medicare?
Yes. William Hayes 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 William Hayes's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Hayes reassigns Medicare benefits to 12 organizations: Emergenchealth PLLC (Fort Worth, TX), Reliance Anesthesia Group, PLLC (Hurst, TX), Anesthesiology Consultants Of North Texas PA (Arlington, TX), Orthomed Staffing LLC (Addison, TX), Austin Anesthesiology Group PLLC (Bryan, TX) and 7 more organizations, listed in the Medicare section above. 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 William Hayes's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Hayes accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Cigna Healthcare and Molina Healthcare and 4 other insurers list William Hayes 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 William Hayes affiliated with any hospitals?
According to CMS data, William Hayes is affiliated with Mercy Medical Center - Cedar Rapids, St Joseph Hospital, Glen Rose Medical Center and University Of Wi Hospitals & Clinics Authority.
When was this NPI record last updated?
The NPPES record for William Hayes was last updated on May 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. William Brendan Hayes, MD · NPI 1760433098
Anesthesiology physician in Fort Worth, Texas. Individual provider, active in the CMS NPPES registry since May 12, 2006.
## Identity
- **NPI:** 1760433098 (Entity type: Individual)
- **Enumerated:** May 12, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 56749 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 4617 BRIARHAVEN RD, Fort Worth, TX 76109-4609
- **Phone:** (817) 776-3621
## 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:** 12 organizations under Medicare reassignment (form CMS-855R): Emergenchealth PLLC (NPI 1467970897, Fort Worth, TX); Reliance Anesthesia Group, PLLC (NPI 1467865600, Hurst, TX); Anesthesiology Consultants Of North Texas PA (NPI 1699712596, Arlington, TX); Orthomed Staffing LLC (NPI 1225514276, Addison, TX); Austin Anesthesiology Group PLLC (NPI 1528326154, Bryan, TX); and 7 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1994
## Record status
- **NPPES last updated:** May 14, 2026
- **Other identifiers:** Medicaid 103430804 (TX); Other 82516 (AR); Medicaid 806823200 (TX); and 4 more
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Source: [NPI Profile](https://npiprofile.com/npi/1760433098) · Data from the CMS NPPES public registry.