Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Lillian T. Chen-Byerley, MS, OTR/L, RCTC

Specialist in Northfield, IL · enumerated 2006.

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

National Provider Identifier

1972514594

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Registry record

Entity type Individual (Type 1)

Name Lillian T. Chen-Byerley

Credential MS, OTR/L, RCTC

Sex Female

Practice address Northfield, IL, 60093

Phone (847) 441-9484

Enumeration date Aug 10, 2006

Last updated in NPPES Nov 17, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 056-000520 (IL) 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

What is the NPI number for Lillian Chen-Byerley?

The National Provider Identifier (NPI) for Lillian Chen-Byerley is 1972514594, a Type 1 (individual) record in the CMS NPPES registry.

Where does Lillian Chen-Byerley practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-17.