Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Madalyn G Neuwirth, MD

Surgical Oncology Physician in Valhalla, NY · enumerated 2012.

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

National Provider Identifier

1255692141

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Madalyn G Neuwirth

Credential MD

Sex Female

Practice address 100 Woods Rd, Valhalla, NY, 10595

Phone (914) 493-2220

Enumeration date Jun 6, 2012

Last updated in NPPES Jun 21, 2021

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MT202188 (PA) Secondary

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians · License 299903 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

Where does Madalyn Neuwirth practice?

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

What is the NPI number for Madalyn Neuwirth?

The National Provider Identifier (NPI) for Madalyn Neuwirth is 1255692141, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-21.