Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Chelsea Ratzlaff, DPT

Physical Therapist in Derby, KS · enumerated 2019.

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

National Provider Identifier

1649823220

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Registry record

Entity type Individual (Type 1)

Name Chelsea Ratzlaff

Credential DPT

Sex Female

Practice address 731 N Klein Cir, Derby, KS, 67037

Phone (316) 719-2400

Enumeration date Jul 22, 2019

Last updated in NPPES Jul 22, 2019

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 11-04617 (KS) Primary

DPT · Doctor of Physical Therapy: A physical therapist holding the clinical doctorate now standard for the profession. About the DPT 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

How do I verify Chelsea Ratzlaff's NPI record?

Cross-check NPI 1649823220 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1649823220 active?

Yes, as of the latest NPPES snapshot, NPI 1649823220 is active (record last updated 2019-07-22).

Other providers at this practice address

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Arlene Salise Physical Therapist · Derby, KS NPI 1770820094 Amanda Swart Physical Therapist · Derby, KS NPI 1528305877 Kathy Massey Occupational Therapy Assistant · Derby, KS NPI 1487992020 Margaret Warren Speech-Language Pathologist · Derby, KS NPI 1740612100 Danielle Small Speech-Language Pathologist · Derby, KS NPI 1700219961 Brittany West Physical Therapy Assistant · Derby, KS NPI 1164856977 Melissa Mcloughlin Occupational Therapy Assistant · Derby, KS NPI 1417364308 Tyan Rorabaugh Physical Therapy Assistant · Derby, KS NPI 1316306772

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-22.