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

Individual provider Registered Nurse · NPI 1023411642

Marissa Wat, RN, MSN is a Certified Registered Nurse Anesthetist (CRNA) in San Francisco, California. Qualified in 2014, 12 years ago. Practices with Western Nevada Anesthesia, a 3-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
12
Licensed in
CA
In the registry since
2014
Specialties on file
2
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.

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Practice location Address checks out

505 Parnassus Ave
San Francisco, CA 94143-2204
Phone: (415) 476-9000
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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 95000265 (CA)
Registered Nurse Taxonomy 163W00000X · Licence 639926 (CA)

Record details

NPI number1023411642
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , MSN
Sole proprietorNo
NPI enumeratedSeptember 28, 2014
Last updated in NPPESNovember 5, 2015

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Western Nevada Anesthesia — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

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