Provider Profile
Marissa Wat, RN, MSN is a certified registered nurse anesthetist based in San Francisco, CA. Marissa is also listed as specializing in registered nurse. According to Medicare claims data, Marissa cared for 253 Medicare patients across 256 services. The services billed most often include anesthesia for other procedure on large bowel using an endoscope, anesthesia for exam of colon using an endoscope, and anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
505 PARNASSUS AVE
San Francisco, CA 94143
Within Certified Registered Nurse Anesthetist generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Acute Pain
Anxiety & Phobias
Face & Jaw
Head & Face
Joint Pain
Joints & Soft Tissue
Maternity
Mental Health
Nerve Pain
Pain
Pelvic & Abdominal
Sedation & Phobias
Spine & Back
Consultations
General Anesthesia
Infusion Therapy
Injections
Joint Injections
Joints & Soft Tissue
Maternity
Nerve Blocks
Pain Management
Pain Relief Procedures
Sedation
Specialized Care
Surgical Pain Relief
Vascular Access
256 services · 253 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Anesthesia for other procedure on large bowel using an endoscope | Anaesthesia | 00811 |
97 | More than most peers in Certified Registered Nurse… |
| Anesthesia for exam of colon using an endoscope | Anaesthesia | 00812 |
69 | More often than most peers in Certified Registered Nurse… |
| Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | Anaesthesia | 00731 |
66 | More than most peers in Certified Registered Nurse… |
| Anesthesia for procedure on small and large bowel using an endoscope | Anaesthesia | 00813 |
24 | More often than most peers in Certified Registered Nurse… |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Marissa Wat, RN is a certified registered nurse anesthetist in San Francisco, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Marissa Wat, RN is listed at 505 Parnassus Ave, San Francisco, CA 94143. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (415) 476-9000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Marissa Wat, RN's National Provider Identifier is 1023411642. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Marissa Wat, RN attended Other, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
Marissa Wat, RN has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
According to Medicare billing data, Marissa Wat, RN provides treatments such as anesthesia for other procedure on large bowel using an endoscope and anesthesia for exam of colon using an endoscope. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Marissa Wat, RN. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.