Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Deborah A Stames-Merz, LICSW

Clinical Social Worker in Lexington, MA · enumerated 2018.

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

National Provider Identifier

1720562093

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Registry record

Entity type Individual (Type 1)

Name Deborah A Stames-Merz

Credential LICSW

Sex Female

Practice address 33 Bedford St Ste 12, Lexington, MA, 02420

Phone (508) 341-6703

Enumeration date Sep 21, 2018

Last updated in NPPES Jan 8, 2021

Taxonomy & licenses

171M00000X Case Manager/Care Coordinator Other Service Providers · License 1030945 (MA) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 1030945 (MA) 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

Where does Deborah Stames-Merz practice?

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

What is the NPI number for Deborah Stames-Merz?

The National Provider Identifier (NPI) for Deborah Stames-Merz is 1720562093, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Shanthi Ganesan Clinical Social Worker · Lexington, MA NPI 1306969936 Joanna Colton Clinical Social Worker · Lexington, MA NPI 1841702776

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-08.