Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ariane Osterwald, DO

Student in an Organized Health Care Education/Training Program in Riverhead, NY · enumerated 2020.

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

National Provider Identifier

1124643747

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Registry record

Entity type Individual (Type 1)

Name Ariane Osterwald

Credential DO

Sex Female

Practice address 1300 Roanoke Ave, Riverhead, NY, 11901

Phone (631) 548-6000

Enumeration date Jun 9, 2020

Last updated in NPPES Jun 9, 2020

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Ariane Osterwald practice?

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

What is the NPI number for Ariane Osterwald?

The National Provider Identifier (NPI) for Ariane Osterwald is 1124643747, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-09.