Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Ilaria Oliver Mastroserio, PA-C

Individual provider Physician Assistant · NPI 1376197590

Ilaria Oliver Mastroserio, PA-C is a Physician Assistant in Walnut Creek, California. Qualified in 2019, 7 years ago. Practices with John Muir Physician Network, a 486-clinician group, accepts Medicare assignment and offers telehealth.

Years since qualifying
7
In the registry since
2019
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

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Practice location Address checks out

177 La Casa Via Ste 390
Walnut Creek, CA 94598-6101
Phone: (925) 692-5610
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X

Record details

NPI number1376197590
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedJuly 25, 2019
Last updated in NPPESMay 22, 2024
Certification dateMay 22, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice John Muir Physician Network — 486 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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