WILLIAM RYAN FOSTER MD
NPI 1093204174
Anesthesiology in Tucson, AZ

Q: 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.

Q: What is William Foster'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 William Foster was last updated on October 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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 May 04, 2018PECOS EnrolledAccepts Medicare Assignment

5301 E GRANT RD, TUCSON, AZ 85712(520) 324-2030 Get Directions Write a Review

NPPES record last updated: October 3, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 22, 2022, Jun 12, 2019, May 4, 2018 (3 updates tracked since 2018).

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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

NPI1093204174

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameWILLIAM RYAN FOSTERCredential: MD

Location Address5301 E GRANT RDTucson, AZ 85712-2874

Mailing Address3510 N Craycroft Rd Apt 6203Tucson, AZ 85718-7287 · (425) 829-8895

Phone(520) 324-2030

Sole ProprietorYes

Medical School CMSNew York Medical CollegeGraduated 2018

Enumeration DateMay 4, 2018

Last NPPES UpdateOctober 3, 20253 updates tracked since enumeration

NPPES CertifiedOctober 3, 2025

✔ NPI 1093204174 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

Licenses✔ Licensed in CA · 165371✔ Licensed in AZ · 65774

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 R76655 (AZ)

5301 E GRANT RD, Tucson, AZ 85712

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Plan, Inc..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.

PECOS PAC ID7416207451

PECOS Enrollment IDI20220913003988

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.

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.

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731

This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.

27 services27 patients

Anesthesia for other procedure on large bowel using an endoscope 00811

Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.

18 services18 patients

Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447

This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.

16 services16 patients

Anesthesia for exam of colon using an endoscope 00812

Anesthesia for a colon examination with an endoscope is a method used to ensure comfort during the procedure. It involves administering medication to help you relax or sleep, thus reducing discomfort as the endoscope, a thin, flexible tube, is navigated through your colon.

12 services12 patients

Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) 64415

This procedure involves injecting a numbing agent or steroid into your arm's nerve bundle. It's done to manage pain or inflammation. The injection helps block nerve signals that cause discomfort, providing relief. It's a safe, common procedure.

11 services11 patients

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.

HOLLY JEANNE GRAHAM M.D.

Anesthesiology

5301 E GRANT RD, THMEP
TUCSON, AZ 85712

Pima County (520) 324-5095

SAMANTHA PENN PHARMD

Pharmacist