Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Marie L. Stiefvater, CRNA

Individual provider Certified Registered Nurse Anesthetist · NPI 1639632862

Marie L. Stiefvater, CRNA is registered under Certified Registered Nurse Anesthetist (CRNA) in Seattle, Washington. Qualified in 2019, 7 years ago. Practices with Providence Health and Services Oregon, a 102-clinician group and accepts Medicare assignment. Licensed in New Mexico and Washington.

Years since qualifying
7
Licensed in
NM, WA
In the registry since
2019
Specialties on file
2
What do these letters mean?
CRNA — Certified Registered Nurse Anesthetist
An advanced practice nurse who administers anaesthesia.

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Practice location Address checks out

1959 NE Pacific St
Seattle, WA 98195
Phone: (206) 520-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence 71375 (NM)
Certified Registered Nurse Anesthetist Taxonomy 367500000X · Licence AP60974946 (WA)

Record details

NPI number1639632862
Entity typeIndividual (Type 1)
GenderFemale
Credentials CRNA
Sole proprietorNo
NPI enumeratedApril 14, 2019
Last updated in NPPESMarch 29, 2023
Certification dateMarch 29, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Providence Health And Services Oregon — 102 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients11
Services billed 13 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Providence Health and Services Oregon

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 102 clinicians in the practice; 12 are shown here.

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