Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Al Chang Hung Lin, PT
Physical Therapist in Rockville, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639232309
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Registry record
Entity type Individual (Type 1)
Name Al Chang Hung Lin
Credential PT
Sex Male
Practice address 9420 Key West Ave, Suite 300, Rockville, MD, 20850
Phone (301) 294-0050
Enumeration date Dec 18, 2006
Last updated in NPPES Jun 2, 2021
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 21326 (MD) 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 Al Lin practice?
The practice location on file with NPPES is in Rockville, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Al Lin?
The National Provider Identifier (NPI) for Al Lin is 1639232309, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-02.