Provider Profile
Marissa M. Grillo, PA-C
Unclaimed ProfileAbout Marissa Grillo
Listed in the NPI registry as a physician assistant, Marissa M. Grillo, PA-C practices in Stanford, CA. Marissa is also listed as specializing in physician assistant — medical. According to Medicare claims data, the services billed most often include critical care, first 30-74 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (650) 723-4000
- Email not available
Practice Locations
300 PASTEUR DR
Stanford, CA 94305
Procedures Most Often Billed to Medicare
16 services · 16 patients · 1 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Critical care, first 30-74 minutes | Office visit | 99291 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Other physician assistants in Stanford 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2022 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Marissa M. Grillo specialize in?
Marissa M. Grillo is a physician assistant in Stanford, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Marissa M. Grillo located?
Marissa M. Grillo is listed at 300 Pasteur Dr, Stanford, CA 94305. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Marissa M. Grillo's phone number?
The number on file is (650) 723-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Marissa M. Grillo?
Marissa M. Grillo's National Provider Identifier is 1629650635. 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
Where did Marissa M. Grillo train?
Marissa M. Grillo attended Other, graduating in 2022. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Marissa M. Grillo have?
Marissa M. Grillo has 4 years experience. Calculated from a graduation year of 2022, reported in the CMS National Downloadable File.
CMS public data
What does Marissa M. Grillo do most often?
According to Medicare billing data, Marissa M. Grillo the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Marissa M. Grillo's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Marissa M. Grillo. 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.