Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Mercedes Zettlemoyer, M.S., CCC-SLP, TSSLD

Speech-Language Pathologist in Annandale, VA · enumerated 2019.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1427606516

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Mercedes Zettlemoyer

Credential M.S., CCC-SLP, TSSLD

Sex Female

Practice address 6715 Little River Turnpike, Suite 200, Annandale, VA, 22003

Phone (703) 879-2479

Fax (703) 879-2803

Enumeration date Aug 31, 2019

Last updated in NPPES Jun 15, 2021

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 2202009977 (VA) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mercedes Zettlemoyer?

The National Provider Identifier (NPI) for Mercedes Zettlemoyer is 1427606516, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mercedes Zettlemoyer practice?

The practice location on file with NPPES is in Annandale, VA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-15.