Brenda J. Ernst, MD

Medicare activity in 2024

Official CMS public-use data for Brenda J. Ernst, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Injection, pembrolizumab, 1 mg (J9271)10,400 services
2. Injection, daratumumab, 10 mg and hyaluronidase-fihj (J9144)10,080 services
3. Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881)7,200 services
4. Injection, fosaprepitant, 1 mg (J1453)6,750 services
5. Injection, nivolumab, 1 mg (J9299)6,240 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol72%
• High blood pressure69%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)53%
• Arthritis40%
• Chronic kidney disease31%
• Ischemic heart disease24%

Hospitals where Brenda J. Ernst works

Medicare's Facility Affiliation Data lists Brenda J. Ernst at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Mayo Clinic HospitalPhoenix, AZ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 030103
• Phoenix Indian Medical CenterPhoenix, AZ · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 030078

Practice locations

Addresses where Brenda J. Ernst is enrolled with Medicare (CMS data updated October 2, 2026).

• 13400 E Shea BlvdScottsdale, AZ 85259 (480) 301‑8000
• 4212 N 16th StPhoenix, AZ 85016 (602) 263‑1200

Group practices

Medicare enrollment lists Brenda J. Ernst as a member of these groups (CMS data updated October 2, 2026).

• Mayo Clinic Arizona1,626 clinicians in the group
• Dhew Ind Hlth SV Hlth SVS and MNTL Hlth Adm227 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in Arizona →

Other hematologist-oncologists in Scottsdale

Clinicians with the same Medicare primary specialty in Scottsdale, AZ — not a recommendation.

• Skyler J. Taylor, MD
• David Cho, MD
• Brendan F. Curley, DO
• Mukundkumar V. Patel, MD
• Oluseyi B. Abidoye, MD
• Julia Wiedmeier, MD
• James Y. Choi, MD
• Felipe B. Batalini Freitas Silva, MD

All hematologist-oncologists in Scottsdale →

Other clinicians in Mayo Clinic Arizona

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Vijayan Balan, MD
• Anthony L. Green, MD
• Georgiana M. Halterman, MD
• Humera Ghafoor, PA
• Michelle R. Abrams, OT
• Mary Ellen Koran, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians