Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nathan J. Sieler, PT

Physical Therapist in Fremont, NE · enumerated 2020.

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

National Provider Identifier

1427645621

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Registry record

Entity type Individual (Type 1)

Name Nathan J. Sieler

Credential PT

Sex Male

Practice address 450 E 23rd St, Fremont, NE, 68025

Phone (402) 941-1699

Fax (402) 941-1688

Enumeration date Dec 22, 2020

Last updated in NPPES Jan 17, 2025

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 4130 (NE) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT 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 Nathan Sieler practice?

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

What is the NPI number for Nathan Sieler?

The National Provider Identifier (NPI) for Nathan Sieler is 1427645621, 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 2025-01-17.