Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Andrea Castonguay, PA

Individual provider Physician Assistant · NPI 1831458603

Andrea Castonguay, PA is a Physician Assistant in Williamsville, New York. Qualified in 2012, 14 years ago. Practices with Erie County Medical Center Corporation, a 322-clinician group and accepts Medicare assignment.

Years since qualifying
14
In the registry since
2012
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

5500 Main St Ste 107
Williamsville, NY 14221-6755 Not confirmed with CMS for 11 years — call before visiting
Phone: (716) 906-5908
Fax: (716) 204-4061
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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 number1831458603
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA
Sole proprietorNo
NPI enumeratedMay 14, 2012
Last updated in NPPESJuly 14, 2015

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Erie County Medical Center Corporation — 322 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients69
Services billed 84 a service is one billed item, such as a visit, a test or a procedure
Average patient age68

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Erie County Medical Center Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 322 clinicians in the practice; 12 are shown here.

Other providers in Williamsville