Dr. William Marsden Stewart, MD
- Medicare services, 2023
- 19
- Medicare patients, 2024
- 31
- Hospital affiliations
- 2
- Industry payments
- $174
- Medical groups
- 2
- Practice address
- 2211 Ne 139th Street, Vancouver, WA 98686
- Practice phone
- Call (360) 487-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Stewart's professional email, personal email and mobile number
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Dr. William Marsden Stewart is an anesthesiologist in Vancouver, Washington
Dr. Stewart practices at Legacy Salmon Creek Medical Center in Vancouver, Washington, part of Legacy Health.
Dr. Stewart's NPI, 1083645451, was assigned on July 5, 2006. Dr. Stewart graduated from University of Utah School of Medicine in 1987. Dr. Stewart holds Washington license MD00028345.
- NPI
- 1083645451NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658428883
- NPI enumeration date
- July 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (360) 487-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Marsden Stewart practices at Legacy Salmon Creek Medical Center in Vancouver, Washington
Dr. Stewart's primary practice is Legacy Salmon Creek Medical Center, at 2211 Ne 139th Street, Vancouver, WA 98686 in Clark County. The practice phone is (360) 487-1000.
- Legacy Salmon Creek Medical Center2211 Ne 139th Street, Vancouver, WA 98686 · Clark CountyPhone(360) 487-1000
Source: Dmand AI Affiliation Data
Dr. William Marsden Stewart is affiliated with 2 sites of care and 2 medical groups
Dr. Stewart's primary practice is Legacy Salmon Creek Medical Center in Vancouver, Washington, part of Legacy Health. Dr. Stewart is also affiliated with St. Joseph Medical Center. The medical group on file is Oregon Anesthesiology Group. Dmand AI also links Dr. Stewart to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Marsden Stewart's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stewart practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Legacy Salmon Creek Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Legacy Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Marsden Stewart is one of 1,332 anesthesiologists in Washington
Anesthesiology is Dr. Stewart's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Stewart is licensed in Washington.
Specialties and state licenses
- Anesthesiology, WashingtonPrimary
Anesthesiologists near Dr. Stewart
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Marsden Stewart billed Medicare for 19 services in 2023
CMS data shows 19 Medicare services from Dr. Stewart across 1 procedure code in 2023, for 31 Medicare patients. Medicare paid $2,102 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Stewart's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Anesthesia
- 2022: 132023: 1946%
Dr. Stewart compared with the Washington median for anesthesiologists, 2023
- Dr. Stewart
- Washington median
- Medicare services
- 19vs 4154% below
- Medicare patients
- 31vs 10771% below
Medians across 1,312 anesthesiologists in Washington with Dmand AI profiles that report each measure.
Dr. Stewart's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Stewart?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Stewart and other anesthesiologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Marsden Stewart treated 31 Medicare patients in 2024, average age 73
CMS counts 31 Medicare patients who saw Dr. Stewart in 2024. 74% of them have high blood pressure, and 61% have high cholesterol. Their average risk score is 1.83, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Stewart's median patient age at 62, with 57% women.
Dr. Stewart's Medicare patients by sex, 2024
- Women1445%
- Men1755%
Chronic conditions among Dr. Stewart's Medicare patients, 2024
- High blood pressure74%
- High cholesterol61%
- Chronic kidney disease52%
- Arthritis45%
- Heart failure39%
- Depression35%
- Mood disorders35%
Share of Medicare patients with each condition. A patient can have several.
Dr. Stewart's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. William Marsden Stewart takes part in Medicare
Dr. Stewart accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Marsden Stewart received $174 in industry payments from 2019 to 2023
CMS Open Payments shows 5 general payments to Dr. Stewart from 1 drug or device company from 2019 to 2023. Consulting fees make up the largest share, 57% of the total. Merck Sharp & Dohme Corporation paid the most, $174.
General payments to Dr. Stewart by program year, 2019 to 2023
General payments to Dr. Stewart by kind, 2019 to 2023
- Consulting fees$10057%
- Food and beverage$7443%
Companies that paid Dr. Stewart the most, 2019 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Marsden Stewart graduated from University of Utah School of Medicine
Dr. Stewart graduated from University of Utah School of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Marsden Stewart's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Marsden Stewart
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Marsden Stewart's NPI number?
Dr. William Marsden Stewart's NPI number is 1083645451. It was assigned on July 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Marsden Stewart?
Dr. William Marsden Stewart is an anesthesiologist in Vancouver, Washington. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. William Marsden Stewart practice?
Dr. Stewart practices at 2211 Ne 139th Street, Vancouver, WA 98686. Dr. Stewart's primary practice is Legacy Salmon Creek Medical Center in Vancouver, Washington, part of Legacy Health. Dmand AI also links Dr. Stewart to 1 medical group.
What is Dr. William Marsden Stewart's office phone number?
The practice phone on file for Dr. Stewart is (360) 487-1000.
What is Dr. William Marsden Stewart's medical license number?
Dr. Stewart holds Washington license MD00028345.
Which hospitals is Dr. William Marsden Stewart affiliated with?
Dr. Stewart practices at Legacy Salmon Creek Medical Center in Vancouver, Washington. Dr. Stewart is also affiliated with St. Joseph Medical Center.
What medical group is Dr. William Marsden Stewart part of?
Dr. Stewart is linked to Oregon Anesthesiology Group. Dmand AI links Dr. Stewart to 1 more medical group.
Does Dr. William Marsden Stewart accept Medicare?
Yes. CMS data shows Dr. Stewart billed Medicare for 19 services in 2023, and Dr. Stewart accepts Medicare assignment.
How many Medicare patients does Dr. William Marsden Stewart see?
CMS counts 31 Medicare patients who saw Dr. Stewart in 2024, with an average age of 73.
What services does Dr. William Marsden Stewart bill to Medicare?
In 2023, Dr. Stewart's most billed Medicare services were anesthesia (00811).
Show 3 more questionsShow fewer questions
Where did Dr. William Marsden Stewart go to medical school?
Dr. Stewart graduated from University of Utah School of Medicine in 1987.
Has Dr. William Marsden Stewart received payments from drug or device companies?
CMS Open Payments shows $174 in general payments to Dr. Stewart from 1 company from 2019 to 2023. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. William Marsden Stewart been practicing?
Dr. Stewart graduated from medical school in 1987, 39 years ago.
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