Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Madelyn Mallone Ratkus, SPEECH PATHOLOGIST

Speech-Language Pathologist in Central Islip, NY · enumerated 2007.

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

National Provider Identifier

1205961828

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Registry record

Entity type Individual (Type 1)

Name Mrs. Madelyn Mallone Ratkus

Credential SPEECH PATHOLOGIST

Sex Female

Practice address Central Islip, NY, 11722

Phone (631) 582-5790

Enumeration date Feb 22, 2007

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 011288-1 (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 Madelyn Ratkus?

The National Provider Identifier (NPI) for Madelyn Ratkus is 1205961828, a Type 1 (individual) record in the CMS NPPES registry.

Where does Madelyn Ratkus practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.