Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Cynthia Libby, MS, RD, LDN, CEDS
Registered Dietitian in Vienna, VA · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1093599045
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Registry record
Entity type Individual (Type 1)
Name Cynthia Libby
Credential MS, RD, LDN, CEDS
Sex Female
Practice address 410 Pine St Se Ste 150, Vienna, VA, 22180
Phone (703) 259-8500
Enumeration date Aug 22, 2023
Last updated in NPPES Aug 26, 2023
Taxonomy & licenses
133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 164.007138 (IL) Primary
RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration.
About the RD 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 Cynthia Libby practice?
The practice location on file with NPPES is in Vienna, VA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Cynthia Libby?
The National Provider Identifier (NPI) for Cynthia Libby is 1093599045, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-26.