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BRENDAN WILLIAMS DNP, CRNA
NPI 1043058910
Nurse Anesthetist, Certified Registered in Fontana, CA

Active since July 16, 2024Accepts Medicare Assignment
15218 SUMMIT AVE STE 300-130, FONTANA, CA 92336(909) 255-2661 Get Directions Write a Review

NPPES record last updated: July 30, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 30, 2024, Jul 16, 2024 (2 updates tracked since 2024).

About Brendan Williams Dnp, Crna NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

BRENDAN WILLIAMS DNP, CRNA (NPI 1043058910) is an individual nurse anesthetist, certified registered in Fontana, California, licensed in California (95002423) and active in the NPI registry since July 2024. He is a graduate of Other (2024).

NPPES Registry Identity

NPI1043058910
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameBRENDAN WILLIAMSCredential: DNP, CRNA
Location Address15218 SUMMIT AVE STE 300-130Fontana, CA 92336-0232
Mailing Address15218 Summit Ave Ste 300-130Fontana, CA 92336-0232
Phone(909) 255-2661
Sole ProprietorYes
Medical School CMSOtherGraduated 2024
Enumeration DateJuly 16, 2024
Last NPPES UpdateJuly 30, 20242 updates tracked since enumeration
NPPES CertifiedJuly 30, 2024
✔ NPI 1043058910 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in CA · 95002423
Definition
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
Also ListedRegistered Nurse · Critical Care MedicineTaxonomy 163WC0200X · License 834447 (CA)
15218 SUMMIT AVE STE 300-130, Fontana, CA 92336
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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

Brendan Williams Dnp, Crna 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.

PECOS PAC ID4789125832
PECOS Enrollment IDI20240917002772

Medicare Billing Reassignments

4

Medicare enrollment records show Brendan Williams reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Vasa Anesthesia Professional Corporation
14 mi
Nurse Anesthetist, Certified Registered
11760 CENTRAL AVE
Chino, CA 91710
  • Reassigned Medicare billing, California enrollment
  • 25 clinicians in this Medicare group
NPI 1356108831 (951) 556-1818
Darin Rentz Do PC
17 mi
Anesthesiology
350 TERRACINA BLVD
Redlands, CA 92373
  • Reassigned Medicare billing, California enrollment
  • 241 clinicians in this Medicare group
NPI 1689321747 (877) 565-6701
Orange Coast Anesthesia Inc
32 mi
Anesthesiology
2601 E CHAPMAN AVE
Orange, CA 92869
  • Reassigned Medicare billing, California enrollment
  • 168 clinicians in this Medicare group
NPI 1508138256 (714) 633-0011
Sound Physicians Anesthesiology Of California PC
41 mi
Anesthesiology
28062 BAXTER RD
Murrieta, CA 92563
  • Reassigned Medicare billing, California enrollment
  • 137 clinicians in this Medicare group
NPI 1699408229 (951) 290-4000

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 92336 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$74.08 typical visit price
range $19.37 – $146.42
Typical copayment $18.52 (range $4.84 – $36.60)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Brendan Williams's NPI number?

The NPI number for Brendan Williams is 1043058910. It was assigned to this individual provider in the NPPES registry on July 16, 2024.

Where is Brendan Williams located?

Brendan Williams practices at 15218 Summit Ave Ste 300-130, Fontana, CA 92336. The listed phone number is (909) 255-2661.

What is Brendan Williams's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Brendan Williams enrolled in Medicare?

Yes. Brendan 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 Brendan Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Brendan Williams reassigns Medicare benefits to 4 organizations: Vasa Anesthesia Professional Corporation (Chino, CA), Darin Rentz Do PC (Redlands, CA), Orange Coast Anesthesia Inc (Orange, CA) and Sound Physicians Anesthesiology Of California PC (Murrieta, CA). 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 Brendan Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Brendan Williams was last updated on July 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.