Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Four Oaks Family and Children'S Services

Psychiatric Residential Treatment Facility in Mason City, IA · enumerated 2019 · authorized official Mary Beth O'Neill, President/Ceo.

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

National Provider Identifier

1851858617

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Four Oaks Family and Children'S Services

Practice address 80 North Eisenhower Ave, Mason City, IA, 50401

Phone (319) 364-0259

Fax (866) 290-5565

Enumeration date Feb 27, 2019

Last updated in NPPES Jan 16, 2026

Taxonomy & classification

323P00000X Psychiatric Residential Treatment Facility Residential Treatment Facilities Primary

Authorized official

Name Mary Beth O'Neill

Title President/Ceo

Phone (319) 364-0259

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2026-01-16. Verify at npiregistry.cms.hhs.gov.

Where is Four Oaks Family and Children'S Services located?

The practice location on file with NPPES is in Mason City, IA.

Providers at this address

Browse all →

Four Oaks Family and Children'S Services Psychiatric Residential Treatment Facility · Mason City, IA NPI 1992262760

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-16.