MARISSA ELIZABETH ST. JOAN PA
NPI 1073981452
Physician Assistant in Stanford, CA
About Marissa Elizabeth St. Joan Pa NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARISSA ELIZABETH ST. JOAN PA (NPI 1073981452) is an individual physician assistant in Stanford, California, licensed in California (57837) and active in the NPI registry since September 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Marissa Elizabeth St. Joan Pa is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marissa St. Joan's NPI number?
The NPI number for Marissa St. Joan is 1073981452. It was assigned to this individual provider in the NPPES registry on September 2, 2015.
Where is Marissa St. Joan located?
Marissa St. Joan practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Marissa St. Joan's specialty?
The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.
Is Marissa St. Joan enrolled in Medicare?
Yes. Marissa St. Joan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
When was this NPI record last updated?
The NPPES record for Marissa St. Joan was last updated on November 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Marissa Elizabeth St. Joan, PA · NPI 1073981452
Physician Assistant physician in Stanford, California. Individual provider, active in the CMS NPPES registry since September 2, 2015.
## Identity
- **NPI:** 1073981452 (Entity type: Individual)
- **Enumerated:** September 2, 2015
- **Primary specialty:** Physician Assistant · taxonomy 363A00000X
- **State license:** 57837 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** November 6, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1073981452) · Data from the CMS NPPES public registry.