Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Anna Louise Grosslein, PT, DPT
Physical Therapist in Waltham, MA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1952669939
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Registry record
Entity type Individual (Type 1)
Name Anna Louise Grosslein
Credential PT, DPT
Sex Female
Practice address 40 2nd Ave, Waltham, MA, 02451
Phone (781) 487-3800
Enumeration date Apr 27, 2012
Last updated in NPPES Apr 27, 2012
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 19971 (MA) 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 Anna Grosslein practice?
The practice location on file with NPPES is in Waltham, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Anna Grosslein?
The National Provider Identifier (NPI) for Anna Grosslein is 1952669939, 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 2012-04-27.