Marissa Wat, RN, MSN - Medicare Certified Registered Nurse Anesthetist (crna) in San Francisco, CA

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Marissa Wat, RN, MSN is a medicare enrolled "Nurse Anesthetist, Certified Registered" in San Francisco, California. She graduated from nursing school in 2014 and has 12 years of diverse experience with area of expertise as Certified Registered Nurse Anesthetist (crna). She is a member of the group practice Western Nevada Anesthesia, Regents Of The Univ Of Ca, Digestive Health Associates, Lifelinc Anesthesia Nevada Pc, Gastroenterology Consultants Ltd, Hospitalist Medicine Physicians Of Washington - Tcs and her current practice location is 505 Parnassus Ave, San Francisco, California. You can reach out to her office (for appointments etc.) via phone at (415) 476-9000.

Marissa Wat is licensed to practice in California (license number 95000265) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1023411642.

Contact Information

Marissa Wat, RN, MSN
505 Parnassus Ave,
San Francisco, CA 94143-2204
(415) 476-9000
Not Available

Map and Direction




Provider's Profile

Full NameMarissa Wat
GenderFemale
SpecialityCertified Registered Nurse Anesthetist (crna)
Experience12 Years
Location505 Parnassus Ave, San Francisco, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Marissa Wat graduated from nursing school in 2014
  NPI Data:
  • NPI Number: 1023411642
  • Provider Enumeration Date: 09/28/2014
  • Last Update Date: 11/05/2015
  Medicare PECOS Information:
  • PECOS PAC ID: 1052639523
  • Enrollment ID: I20210910001323

Medical Identifiers

Medical identifiers for Marissa Wat such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1023411642NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
163W00000XRegistered Nurse 639926 (California)Secondary
367500000XNurse Anesthetist, Certified Registered 95000265 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
University Of California Davis Medical CenterSacramento, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Western Nevada Anesthesia32749998423
Regents Of The Univ Of Ca33754566191571
Digestive Health Associates054724708238
Lifelinc Anesthesia Nevada Pc89214318005
Gastroenterology Consultants Ltd094110747839
Hospitalist Medicine Physicians Of Washington - Tcs6800240102197

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Marissa Wat allows following entities to bill medicare on her behalf.
Entity NameGastroenterology Consultants Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1144218512
PECOS PAC ID: 0941107478
Enrollment ID: O20031215000151
Entity NameDigestive Health Associates
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1689775595
PECOS PAC ID: 0547247082
Enrollment ID: O20040702000347
Entity NameLifelinc Anesthesia Nevada PC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1851950463
PECOS PAC ID: 8921431800
Enrollment ID: O20191206001221
Entity NameCarson Tahoe Physician Hospital Organization, LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1063169829
PECOS PAC ID: 8628465721
Enrollment ID: O20220419002777
Entity NameCollins Carson City Anesthesia LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285330423
PECOS PAC ID: 5799141016
Enrollment ID: O20230511002066
Entity NameWestern Nevada Anesthesia
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396462248
PECOS PAC ID: 3274999842
Enrollment ID: O20230524001575
Entity NameSafe Hands Anesthesia PLLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1952251191
PECOS PAC ID: 6608358759
Enrollment ID: O20260306002047

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Marissa Wat is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Marissa Wat, RN, MSN
505 Parnassus Ave,
San Francisco, CA 94143-2204

Ph: Not Available		Marissa Wat, RN, MSN
505 Parnassus Ave,
San Francisco, CA 94143-2204

Ph: (415) 476-9000

Reviews and Comments


Nurse Anesthetist, Certified Registered Nurses in San Francisco, CA

Robert Christian Wenz,
Nurse Anesthetist - CR
Medicare: Accepting Medicare Assignments
Practice Location: 505 Parnassus Ave, San Francisco, CA 94143
Phone: 415-353-8054    Fax: 415-353-8674
Christine Iyer, CRNA
Nurse Anesthetist - CR
Medicare: Accepting Medicare Assignments
Practice Location: 1160 Post St, San Francisco, CA 94109
Phone: 415-440-1100    Fax: 415-440-6430
Hans K Hoogs, CRNA
Nurse Anesthetist - CR
Medicare: Accepting Medicare Assignments
Practice Location: 1001 Potrero Ave # 3c38, San Francisco, CA 94110
Phone: 628-206-8145    Fax: 628-206-6014
Molyan Hiett Dery, CRNA
Nurse Anesthetist - CR
Medicare: Not Enrolled in Medicare
Practice Location: 1160 Post St, San Francisco, CA 94109
Phone: 415-440-1100    Fax: 415-440-6430
Mardochee Val, CRNA
Nurse Anesthetist - CR
Medicare: Accepting Medicare Assignments
Practice Location: 505 Parnassus Ave, San Francisco, CA 94143
Phone: 415-353-3918    
Kesiah Daphne Louis, CRNA
Nurse Anesthetist - CR
Medicare: Accepting Medicare Assignments
Practice Location: 505 Parnassus Ave, San Francisco, CA 94143
Phone: 415-353-8054    Fax: 415-353-8674
Lois Jacobs, CRNA
Nurse Anesthetist - CR
Medicare: Not Enrolled in Medicare
Practice Location: 4150 Clement St, San Francisco, CA 94121
Phone: 415-750-2069    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.