Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Molly Ann Mayer, LGSW

Social Worker in Washington, DC · enumerated 2021.

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

National Provider Identifier

1073199337

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Registry record

Entity type Individual (Type 1)

Name Molly Ann Mayer

Credential LGSW

Sex Female

Practice address 1627 K St Nw Ste 500, Washington, DC, 20006

Phone (202) 515-1993

Enumeration date Mar 18, 2021

Last updated in NPPES Mar 18, 2021

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License LG50083239 (DC) 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

Is NPI 1073199337 active?

Yes, as of the latest NPPES snapshot, NPI 1073199337 is active (record last updated 2021-03-18).

How do I verify Molly Mayer's NPI record?

Cross-check NPI 1073199337 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-18.