Andrea Castonguay, PA
NPI 1831458603 · Physician Assistant · Williamsville, NY
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrea Castonguay, PA is a Physician Assistant provider in Williamsville, NY (NPI 1831458603).
Provider details
- NPI number
- 1831458603
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
64 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 45 | $53 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 19 | $47 |
Typical Medicare-allowed amounts for these services range $47–$53 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 29 | 26 |
| Ibuprofen | 27 | 19 |
| Meloxicam | 21 | — |
| Oxycodone Hcl | 18 | 16 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 17 | — |
| Doxycycline Hyclate | 14 | 13 |
| Tramadol Hcl | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-14
- Last updated
- 2015-07-14
Frequently asked questions
- What is Andrea Castonguay's NPI number?
- Andrea Castonguay's National Provider Identifier (NPI) is 1831458603, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrea Castonguay's specialty?
- Andrea Castonguay is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Andrea Castonguay located?
- Andrea Castonguay's practice location on file with NPPES is 5500 Main St, Williamsville, NY 14221-6755.
- What is Andrea Castonguay's phone number?
- The practice phone number listed in the NPPES registry for Andrea Castonguay is (716) 906-5908.
- Does Andrea Castonguay accept Medicare?
- Andrea Castonguay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrea Castonguay's NPI active?
- Yes — Andrea Castonguay's NPI (1831458603) is active in the NPPES registry as of the last update on 2015-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.