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Critical Care (Intensivists)

Frederick A. Willyerd, MD

Sees patients in Phoenix, AZ · Arizona

Summary

Frederick A. Willyerd, MD (Critical Care (Intensivists)) is enrolled with Medicare at 2 practice locations in Phoenix, AZ. NPI 1255661468. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(602) 933‑0930 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Frederick A. Willyerd, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

2Practice locations
Critical Care (Intensivists)Primary specialty
YesAccepts Medicare assignment
19Years since medical school (graduated 2007)
Creighton University School Of MedicineMedical school
MaleGender (as listed)
Phoenix Children's HospitalGroup practice

Quick answers

Where does Frederick A. Willyerd see patients?
Medicare's clinician data lists 2 practice locations, including Phoenix, AZ. Call before your visit to confirm the address.
What is Frederick A. Willyerd's specialty?
Medicare lists Critical Care (Intensivists) as the primary specialty, and also Pediatric Medicine.
Does Frederick A. Willyerd accept Medicare assignment?
Yes. Medicare's clinician data says Frederick A. Willyerd accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Frederick A. Willyerd?
(602) 933-0930, as listed in official Medicare / NPI Registry data.
What is Frederick A. Willyerd's NPI number?
1255661468. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Frederick A. Willyerd is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Frederick A. Willyerd as a member of this group (CMS data updated 2026-10-02).

  • Phoenix Children's Hospital437 clinicians in the group

Specialties

Find other Critical Care (Intensivists) doctors in Arizona →

Other critical care doctors in Phoenix

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

All critical care doctors in Phoenix →

Clinician information

CredentialMD
Medical schoolCreighton University School Of Medicine
Graduation year2007
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1255661468
CorrectionsReport an error or suggest an update →

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. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians