What is Sierra Castonguay's NPI number?

Sierra Castonguay's National Provider Identifier (NPI) is 1740089606, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Sierra Castonguay's specialty?

Sierra Castonguay is listed in the NPPES registry with a primary specialty of Athletic Trainer (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).

Where is Sierra Castonguay located?

Sierra Castonguay's practice location on file with NPPES is 96 Falmouth St, Portland, ME 04103-4864.

What is Sierra Castonguay's phone number?

The practice phone number listed in the NPPES registry for Sierra Castonguay is (800) 800-4876.

Is Sierra Castonguay's NPI active?

Yes — Sierra Castonguay's NPI (1740089606) is active in the NPPES registry as of the last update on 2026-01-10.

IndividualActive

Sierra Castonguay, MS, LAT, ATC

NPI 1740089606 · Athletic Trainer · Portland, ME

Sierra Castonguay, MS, LAT, ATC is a Athletic Trainer provider in Portland, ME (NPI 1740089606).

Provider details

NPI number: 1740089606
Entity type: Individual
Primary specialty: Athletic TrainerRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Credential: MS, LAT, ATC
Sex: Female
Sole proprietor: No
License: AT992 (ME)

Practice location

96 Falmouth St

Portland, ME 04103-4864

Phone: (800) 800-4876

Street-level locationGet directions

More ME providers

Mailing address

6 Patriots Ln

Nottingham, NH 03290-5821

Specialties & taxonomies

Athletic TrainerPrimary2255A2300XLicense AT992 (ME)
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Athletic Trainer2255A2300XLicense 1626 (NH)
Respiratory, Developmental, Rehabilitative and Restorative Service Providers

Profile Score

Established profile(56/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

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.

Enumerated: 2025-03-12
Last updated: 2026-01-10
Certified: 2026-01-10

Frequently asked questions

What is Sierra Castonguay's NPI number?: Sierra Castonguay's National Provider Identifier (NPI) is 1740089606, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Sierra Castonguay's specialty?: Sierra Castonguay is listed in the NPPES registry with a primary specialty of Athletic Trainer (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
Where is Sierra Castonguay located?: Sierra Castonguay's practice location on file with NPPES is 96 Falmouth St, Portland, ME 04103-4864.
What is Sierra Castonguay's phone number?: The practice phone number listed in the NPPES registry for Sierra Castonguay is (800) 800-4876.
Is Sierra Castonguay's NPI active?: Yes — Sierra Castonguay's NPI (1740089606) is active in the NPPES registry as of the last update on 2026-01-10.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions