WILLIAM RYAN FOSTER MD
NPI 1093204174
Anesthesiology in Tucson, AZ
About William Ryan Foster Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM RYAN FOSTER MD (NPI 1093204174) is an individual anesthesiology provider in Tucson, Arizona, licensed in California (165371) and active in the NPI registry since May 2018. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (2018).
NPPES Registry Identity
Specialties & Licenses 2
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.
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
William Ryan Foster Md 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
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.
TUCSON, AZ 85712
TUCSON, AZ 85712
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 Foster's NPI number?
The NPI number for William Foster is 1093204174. It was assigned to this individual provider in the NPPES registry on May 4, 2018.
Where is William Foster located?
William Foster practices at 5301 E Grant Rd, Tucson, AZ 85712. The listed phone number is (520) 324-2030.
What is William Foster's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is William Foster enrolled in Medicare?
Yes. William Foster 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.
What insurance does William Foster accept?
Health plans from Oscar Health Plan, Inc. list William Foster as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for William Foster was last updated on October 3, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.
