# William H Sierra, PA

Source: https://ourhealthnetwork.com/doctor/william-sierra-pa-1992721229
NPI: 1992721229
Data source: CMS NPI Registry (NPPES), refreshed monthly

## Quick facts

William H Sierra, PA is a physician assistant based in West Islip, NY with NPI 1992721229.

## Profile

- Primary specialty: Physician Assistant
- Credential: PA
- Gender: Male
- NPI: 1992721229 ([NPPES record](https://npiregistry.cms.hhs.gov/provider-view/1992721229))

## Practice and contact

- Address: 1000 Montauk Hwy, West Islip, NY, 117954927
- Phone: (631) 376-3000

## Insurance accepted (1 networks)

This provider is in network with the following insurance carriers, based on federal Transparency in Coverage filings and FHIR provider directories:

- [UMR](https://ourhealthnetwork.com/insurance/umr) — 1 plan

To verify a specific plan covers William H Sierra, use the [OurHealthNetwork Insurance Matcher](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1992721229).

## Industry payments disclosure (CMS Open Payments)

Per CMS Open Payments data (most recent year 2024), this provider has received 15 disclosed payments from medical industry sources totaling approximately $492.

Largest disclosed payer: ALK-Abello, Inc ($220 cumulative).

Source: CMS Open Payments program (federal financial-transparency dataset). Industry payment disclosures do not imply any wrongdoing; many are legitimate consulting fees, research support, or speaker honoraria.

## Related on OurHealthNetwork

- [More Physician Assistant doctors in WEST ISLIP, NY](https://ourhealthnetwork.com/physician-assistant/ny/west-islip)
- [Find insurance plans that cover this doctor](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1992721229)
- [Browse all 5.5M US healthcare providers](https://ourhealthnetwork.com/find-doctors)
- [About our data and methodology](https://ourhealthnetwork.com/methodology)