Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. BAYLEY KEIKO LEONAHE BRENNAN MD
NPI 1861295529
Anesthesiology in Scottsdale, AZ

Q: What is Bayley Brennan's NPI number?

The NPI number for Bayley Brennan is 1861295529. It was assigned to this individual provider in the NPPES registry on March 28, 2025.

Q: What is Bayley Brennan's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for Bayley Brennan was last updated on July 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days 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.

Active since March 28, 2025PECOS Enrolled

13400 E SHEA BLVD, SCOTTSDALE, AZ 85259(480) 301-8000 Get Directions Write a Review

NPPES record last updated: July 1, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 9, 2025, Jun 11, 2025, Mar 28, 2025 (3 updates tracked since 2025).

On this page

About Dr. Bayley Keiko Leonahe Brennan Md NPPES

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

DR. BAYLEY KEIKO LEONAHE BRENNAN MD (NPI 1861295529) is an individual anesthesiology provider in Scottsdale, Arizona, licensed in Arizona (R81493) and active in the NPI registry since March 2025. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1861295529

Entity TypeIndividualFemale

Primary Taxonomy207L00000X

Provider Legal NameDR. BAYLEY KEIKO LEONAHE BRENNANCredential: MD

Location Address13400 E SHEA BLVDScottsdale, AZ 85259-5452

Mailing AddressPo Box 860912Minneapolis, MN 55486-0912 · (480) 301-8000

Phone(480) 301-8000

Sole ProprietorNo

Enumeration DateMarch 28, 2025

Last NPPES UpdateJuly 1, 20263 updates tracked since enumeration

NPPES CertifiedJuly 1, 2026

✔ NPI 1861295529 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in AZ · R81493

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

Also ListedInternal MedicineTaxonomy 207R00000X · License R81493 (AZ)

13400 E SHEA BLVD, Scottsdale, AZ 85259

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Bayley Keiko Leonahe Brennan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

AMITKUMAR MEHTA MD

Internal Medicine (Hematology & Oncology)