Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Marissa Simone Nelson, LGMFT

Marriage & Family Therapist in Washington, DC · enumerated 2014.

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

National Provider Identifier

1922409150

Verified

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Registry record

Entity type Individual (Type 1)

Name Marissa Simone Nelson

Credential LGMFT

Sex Female

Practice address Washington, DC, 20009

Phone (202) 374-7448

Enumeration date Sep 8, 2014

Last updated in NPPES Sep 8, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License LGM508 (MD) 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 Marissa Nelson?

The National Provider Identifier (NPI) for Marissa Nelson is 1922409150, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marissa Nelson practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-08.