Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Madeline Twiss, PA-C

Physician Assistant in Potsdam, NY · enumerated 2017.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1912428996

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Registry record

Entity type Individual (Type 1)

Name Madeline Twiss

Credential PA-C

Sex Female

Practice address 50 Leroy St, Potsdam, NY, 13676

Phone (315) 265-3300

Enumeration date Jun 29, 2017

Last updated in NPPES Mar 31, 2021

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 020997 (NY) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Madeline Twiss?

The National Provider Identifier (NPI) for Madeline Twiss is 1912428996, a Type 1 (individual) record in the CMS NPPES registry.

Where does Madeline Twiss practice?

The practice location on file with NPPES is in Potsdam, NY. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-31.