Ilaria Oliver Mastroserio, PA-C - Medicare Physician Assistant in Walnut Creek, CA

Ilaria Oliver Mastroserio, PA-C is a medicare enrolled "Physician Assistant" in Walnut Creek, California. She graduated from nursing school in 2019 and has 6 years of diverse experience with area of expertise as Physician Assistant. She is a member of the group practice Regents Of The University Of California, John Muir Physician Network and her current practice location is 177 La Casa Via Ste 390, Walnut Creek, California. You can reach out to her office (for appointments etc.) via phone at (925) 692-5610.

Ilaria Oliver Mastroserio is licensed to practice in * (Not Available) (license number ) 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 1376197590.

Contact Information

Ilaria Oliver Mastroserio, PA-C
177 La Casa Via Ste 390,
Walnut Creek, CA 94598-6101
(925) 692-5610
Not Available

Map and Direction




Provider's Profile

Full NameIlaria Oliver Mastroserio
GenderFemale
SpecialityPhysician Assistant
Experience6 Years
Location177 La Casa Via Ste 390, Walnut Creek, 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:
  • Ilaria Oliver Mastroserio graduated from nursing school in 2019
  NPI Data:
  • NPI Number: 1376197590
  • Provider Enumeration Date: 07/25/2019
  • Last Update Date: 05/22/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 0840521779
  • Enrollment ID: I20231023003598

Medical Identifiers

Medical identifiers for Ilaria Oliver Mastroserio such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1376197590NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363A00000XPhysician Assistant (* (Not Available))Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Ucsf Medical CenterSan francisco, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Regents Of The University Of California4284547274581
John Muir Physician Network6608789813442

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. Ilaria Oliver Mastroserio 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
Ilaria Oliver Mastroserio, PA-C
1450 Treat Blvd Ste 300,
Walnut Creek, CA 94597-2168

Ph: (925) 952-2828
Ilaria Oliver Mastroserio, PA-C
177 La Casa Via Ste 390,
Walnut Creek, CA 94598-6101

Ph: (925) 692-5610

Reviews and Comments


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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.