Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alison Sonak, RD
Registered Dietitian in Reston, VA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1932478039
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Registry record
Entity type Individual (Type 1)
Name Alison Sonak
Credential RD
Sex Female
Practice address 11335 Sunset Hills Rd, Reston, VA, 20190
Phone (703) 348-7857
Fax (703) 444-4308
Enumeration date Dec 19, 2011
Last updated in NPPES Dec 19, 2011
Taxonomy & licenses
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 Alison Sonak practice?
The practice location on file with NPPES is in Reston, VA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Alison Sonak?
The National Provider Identifier (NPI) for Alison Sonak is 1932478039, 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 2011-12-19.