Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marguerite Grabenstein, DPT
Physical Therapist in Bethesda, MD · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1720704281
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Registry record
Entity type Individual (Type 1)
Name Marguerite Grabenstein
Credential DPT
Sex Female
Practice address 6410 Rockledge Dr Ste 301, Bethesda, MD, 20817
Phone (301) 897-0357
Enumeration date Oct 17, 2022
Last updated in NPPES Oct 17, 2022
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 19784 (MD) Primary
DPT · Doctor of Physical Therapy: A physical therapist holding the clinical doctorate now standard for the profession.
About the DPT 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
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Marguerite Grabenstein?
Marguerite Grabenstein is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Shari Cantor Orthopedic Physical Therapist · Bethesda, MD NPI 1578743506 Morgane Gay Orthopedic Physical Therapist · Bethesda, MD NPI 1003273723 Alexandra Vlade Physical Therapist · Bethesda, MD NPI 1861082737 Nigell Essix Physical Therapist · Bethesda, MD NPI 1366277865 Kameelah Slater Physical Therapist · Bethesda, MD NPI 1326924994 Dominic Tolentino Physical Therapist · Bethesda, MD NPI 1689546970
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-17.