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DR. WILLIAM WALKER M.D.
NPI 1457321192
Preventive Medicine - Aerospace Medicine in Vail, AZ

Active since January 25, 2006PECOS Enrolled
14336 E MANHEAD LOOKOUT DR, VAIL, AZ 85641(520) 975-7083 Get Directions Write a Review

NPPES record last updated: May 29, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. William Walker M.d. NPPES

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

DR. WILLIAM WALKER M.D. (NPI 1457321192) is an individual aerospace medicine provider in Vail, Arizona, licensed in Indiana (01059020A) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1457321192
Entity TypeIndividualMale
Primary Taxonomy2083A0100X
Provider Legal NameDR. WILLIAM WALKERCredential: M.D.
Location Address14336 E MANHEAD LOOKOUT DRVail, AZ 85641-2550
Mailing Address14336 E Manhead Lookout DrVail, AZ 85641-2550 · (520) 975-7083
Phone(520) 975-7083
Sole ProprietorYes
Enumeration DateJanuary 25, 2006
Last NPPES UpdateMay 29, 2013
✔ NPI 1457321192 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPreventive Medicine · Aerospace MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2083A0100X
License✔ Licensed in IN · 01059020A
Definition
Aerospace medicine focuses on the clinical care, research, and operational support of the health, safety, and performance of crewmembers and passengers of air and space vehicles, together with the support personnel who assist operation of such vehicles. This population often works and lives in remote, isolated, extreme, or enclosed environments under conditions of physical and psychological stress. Practitioners strive for an optimal human-machine match in occupational settings rich with environmental hazards and engineering countermeasures.
14336 E MANHEAD LOOKOUT DR, Vail, AZ 85641
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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 (PECOS)

Dr. William Walker M.d. 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.

Medicare Billing Reassignments

2

Medicare enrollment records show William Walker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Emergency Staffing Solutions Inc
1,013 mi
Emergency Medicine
240 HIGHLAND DR
Many, LA 71449
  • Reassigned Medicare billing, New Mexico enrollment
  • 152 clinicians in this Medicare group
NPI 1477590974 (318) 256-5691
Ess Hospitalist LLC
1,095 mi
Hospitalist
1015 UNITY RD
Crossett, AR 71635
  • Reassigned Medicare billing, New Mexico enrollment
  • 114 clinicians in this Medicare group
NPI 1881967305 (866) 931-8882

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 85641 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
$127.71 typical visit price
range $55.44 – $168.60
Typical copayment $31.92 (range $13.86 – $42.15)
Most-billed visit code 99204
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
Most-billed visit code 99214
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 William Walker's NPI number?

The NPI number for William Walker is 1457321192. It was assigned to this individual provider in the NPPES registry on January 25, 2006.

Where is William Walker located?

William Walker practices at 14336 E Manhead Lookout Dr, Vail, AZ 85641. The listed phone number is (520) 975-7083.

What is William Walker's specialty?

The primary specialty registered for this NPI is Preventive Medicine, specializing in Aerospace Medicine, with taxonomy code 2083A0100X.

Is William Walker enrolled in Medicare?

Yes. William Walker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Walker reassigns Medicare benefits to 2 organizations: Emergency Staffing Solutions Inc (Many, LA) and Ess Hospitalist LLC (Crossett, AR). 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 Walker'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 William Walker was last updated on May 29, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.