Doctor profile · Federal record
Dr. Marissa Wat, RN, MSN
Certified Registered Nurse Anesthetist (CMS: Certified Registered Nurse Anesthetist (CRNA)) · Registered Nurse · San Francisco, CA
- NPI 1023411642
- Accepts Medicare
- MIPS 78.8 / 100 · 2023
- 12 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
505 Parnassus Ave
San Francisco, CA 941432204
(415) 476-9000
Credentials & registration
- NPI registered
- September 2014 — 12 yrs on file
- Profile last updated
- November 5, 2015
- Year of graduation
- 2014 — 12 yrs since
- Specialty taxonomy
- 367500000X — NUCC code
- State licenses (2)
- California #95000265 · California #639926
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1023411642. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
170
Distinct HCPCS
4
Medicare allowed
$20,931
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
00811 |
Anesthesia for other procedure on large bowel using an endoscope | 64 | 64 | $124 | |
00731 |
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 57 | 57 | $133 | |
00812 |
Anesthesia for exam of colon using an endoscope | 38 | 38 | $97 | |
00813 |
Anesthesia for procedure on small and large bowel using an endoscope | 11 | 11 | $159 |
In context: peer comparison
Among 32 peers in San Francisco Certified Registered Nurse Anesthetist, average services per provider: 31. This provider delivers 5.5× the peer median.Open Payments
Industry payments received
All-time total
$96
Transactions
4
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 2 | $35.67 | |
| Madrigal Pharmaceuticals | 1 | $34.13 | |
| Intercept Pharmaceuticals, INC. | 1 | $26.11 |
By nature of payment
Frequently asked questions
What is Dr. Marissa Wat's medical specialty?
Dr. Marissa Wat practices Certified Registered Nurse Anesthetist in San Francisco, CA.
Where does Dr. Marissa Wat practice?
Dr. Marissa Wat practices at 505 Parnassus Ave, San Francisco, CA 941432204. Office phone: 4154769000.
What is Dr. Marissa Wat's NPI?
Dr. Marissa Wat's National Provider Identifier (NPI) is 1023411642, issued by NPPES.
Does Dr. Marissa Wat accept Medicare assignment?
Yes. Dr. Marissa Wat accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Marissa Wat commonly perform?
Top Medicare-reported procedures in 2023: Anesthesia for other procedure on large bowel using an endoscope (HCPCS 00811); Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (HCPCS 00731); Anesthesia for exam of colon using an endoscope (HCPCS 00812). Source: CMS Medicare Physician & Other Practitioners file.