Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Marietta F Grundlehner, MD
Specialist in Fairfax, VA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1740288315
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Registry record
Entity type Individual (Type 1)
Name Dr. Marietta F Grundlehner
Credential MD
Sex Female
Practice address 3700 Joseph Siewick Dr, #305, Fairfax, VA, 22033
Phone (703) 476-1740
Fax (703) 476-6432
Enumeration date Jul 8, 2005
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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 Marietta Grundlehner practice?
The practice location on file with NPPES is in Fairfax, VA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marietta Grundlehner?
The National Provider Identifier (NPI) for Marietta Grundlehner is 1740288315, 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 2007-07-08.