Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Catherine Irby, PT
Physical Therapist in Lynnwood, WA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861619447
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Registry record
Entity type Individual (Type 1)
Name Ms. Catherine Irby
Credential PT
Sex Female
Practice address 19401 40th Ave W, Lynnwood, WA, 98036
Phone (425) 670-9987
Enumeration date Apr 18, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PT00002122 (WA) 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.
Frequently asked questions
Where does Catherine Irby practice?
The practice location on file with NPPES is in Lynnwood, WA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Catherine Irby?
The National Provider Identifier (NPI) for Catherine Irby is 1861619447, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Phyllis Hollenbeck Family Medicine Physician · Lynnwood, WA NPI 1225027006 Jeffrey Cantor Family Medicine Physician · Lynnwood, WA NPI 1851380018 Timothy Halm Family Medicine Physician · Lynnwood, WA NPI 1295724482 Karen Hibbert Internal Medicine Physician · Lynnwood, WA NPI 1710977194 Pacmed Clinics Multi-Specialty Clinic/Center · Lynnwood, WA NPI 1477594356 Integrative Spine & Body Medicine Physical Medicine & Rehabilitation Physician · Lynnwood, WA NPI 1639260615 Nicole Severino Physical Therapist · Lynnwood, WA NPI 1457420507 Megan Wong Physical Therapist · Lynnwood, WA NPI 1154492981
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.