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DR. WILLIAM MARSDEN STEWART M.D.
NPI 1083645451
Anesthesiology in Tacoma, WA

Active since July 05, 2006PECOS EnrolledAccepts Medicare Assignment
1717 S J ST, TACOMA, WA 98405(425) 284-1545(425) 284-1546 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. William Marsden Stewart M.d. NPPES

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

DR. WILLIAM MARSDEN STEWART M.D. (NPI 1083645451) is an individual anesthesiology provider in Tacoma, Washington, licensed in Washington (MD00028345) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Legacy Salmon Creek Medical Center, and is a graduate of University Of Utah School Of Medicine (1987).

NPPES Registry Identity

NPI1083645451
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. WILLIAM MARSDEN STEWARTCredential: M.D.
Location Address1717 S J STTacoma, WA 98405-4933
Mailing Address1717 S J StTacoma, WA 98405-4933
Phone(425) 284-1545
Fax(425) 284-1546
Sole ProprietorNo
Medical School CMSUniversity Of Utah School Of MedicineGraduated 1987
Enumeration DateJuly 5, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1083645451 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in WA · MD00028345
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.
1717 S J ST, Tacoma, WA 98405
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Other Identifiers 4

Medicaid8128985WA
Medicare UPINF04640
OtherST0235B/s Regence 90
Other62870L&i

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William Marsden Stewart M.d. 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 ID1658428883
PECOS Enrollment IDI20090406000059
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 Stewart reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Pacific Anesthesia PC
Same address
Anesthesiology
1717 S J ST
Tacoma, WA 98405
  • Reassigned Medicare billing, Washington enrollment
  • 152 clinicians in this Medicare group
NPI 1497796452 (253) 426-4101
Oregon Anesthesiology Group PC
120 mi
Anesthesiology
707 SW WASHINGTON ST, SUITE 700
Portland, OR 97205
  • Reassigned Medicare billing, Washington enrollment
  • 180 clinicians in this Medicare group
NPI 1477527786 (503) 299-9906

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Legacy Salmon Creek Medical Center

Acute Care Hospitals · Vancouver, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500150
Location2211 NE 139th StreetVancouver, WA 98686 · Clark County
Emergency services Birthing friendly

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.

ELIZABETH CULP
Registered Nurse
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6163
GLAUCIA DE CASTRO MOREIRA M.D.
Anesthesiology
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6625
GRANT ALEXANDER YELLIOTT II PA C
Physician Assistant
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6660
MS. JESSICA WAI-YING TAM MD
Internal Medicine
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6341
KARA SPRINGER CRANE PHARMD
Pharmacist
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 432-8216
BROOKE ELIZABETH CLOVER-OWENS RN
Registered Nurse (Obstetric, Inpatient)
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-4101
NATHANIEL ERIC SIEV MD
Anesthesiology
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-4101
PRISCILLA RUTH JAMES AGACNP-BC
Nurse Practitioner (Gerontology)
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6341

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 Stewart's NPI number?

The NPI number for William Stewart is 1083645451. It was assigned to this individual provider in the NPPES registry on July 5, 2006.

Where is William Stewart located?

William Stewart practices at 1717 S J St, Tacoma, WA 98405. The listed phone number is (425) 284-1545.

What is William Stewart's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is William Stewart enrolled in Medicare?

Yes. William Stewart 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.

Which organizations bill Medicare for William Stewart's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Stewart reassigns Medicare benefits to 2 organizations: Pacific Anesthesia PC (Tacoma, WA) and Oregon Anesthesiology Group PC (Portland, OR). 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 Stewart's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William Stewart affiliated with any hospitals?

According to CMS data, William Stewart is affiliated with Legacy Salmon Creek Medical Center.

When was this NPI record last updated?

The NPPES record for William Stewart was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.