Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mary Lynn Hafner, PT, DPT
Physical Therapist in Sammamish, WA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639477243
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Registry record
Entity type Individual (Type 1)
Name Dr. Mary Lynn Hafner
Credential PT, DPT
Sex Female
Practice address 2099 215th Pl Se, Sammamish, WA, 98075
Phone (425) 654-2575
Enumeration date Mar 6, 2011
Last updated in NPPES Dec 2, 2024
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 23246 (CA) Secondary
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 60397911 (WA) Primary
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Secondary
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 Mary Hafner practice?
The practice location on file with NPPES is in Sammamish, WA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Hafner?
The National Provider Identifier (NPI) for Mary Hafner is 1639477243, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-02.