NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. John Ostaszewski

Adult Psychiatric/Mental Health Registered Nurse in Coralville, IA · enumerated 2025 · practices at Omaha Vamc.

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

National Provider Identifier

1154283646

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. John Ostaszewski
Sex Male
Practice address 2213 2nd St, Coralville, IA, 52241
Phone (319) 338-0581
Enumeration date Dec 2, 2025
Last updated in NPPES Dec 2, 2025

Taxonomy & licenses

163WP0809X Adult Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 144081 (IA) 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

How do I verify John Ostaszewski's NPI record?
Cross-check NPI 1154283646 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1154283646 active?
Yes, as of the latest NPPES snapshot, NPI 1154283646 is active (record last updated 2025-12-02).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-02.