Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARGOT LAMSON
NPI 1205212990
Counselor - Mental Health in Washington, DC

Q: What is Margot Lamson's NPI number?

The NPI number for Margot Lamson is 1205212990. It was assigned to this individual provider in the NPPES registry on August 4, 2015.

Q: What is Margot Lamson's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Q: When was this NPI record last updated?

The NPPES record for Margot Lamson was last updated on August 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 04, 2015

1350 CONNECTICUT AVE NW STE 1030, WASHINGTON, DC 20036(202) 894-9307 Get Directions Write a Review

NPPES record last updated: August 7, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Margot Lamson NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARGOT LAMSON (NPI 1205212990) is an individual mental health provider in Washington, District Of Columbia, licensed in District Of Columbia (LC50080341) and active in the NPI registry since August 2015.

NPPES Registry Identity

NPI1205212990

Entity TypeIndividualFemale

Primary Taxonomy101YM0800X

Provider Legal NameMARGOT LAMSON

Location Address1350 CONNECTICUT AVE NW STE 1030Washington, DC 20036-1730

Mailing Address1350 Connecticut Ave Nw Ste 1030Washington, DC 20036-1730 · (202) 894-9307

Phone(202) 894-9307

Sole ProprietorNo

Enumeration DateAugust 4, 2015

Last NPPES UpdateAugust 7, 2026

NPPES CertifiedAugust 7, 2026

✔ NPI 1205212990 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers

Taxonomy Code101YM0800X

License✔ Licensed in DC · LC50080341

1350 CONNECTICUT AVE NW STE 1030, Washington, DC 20036

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Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARGOT LAMSON LICSW, LLC

Counselor (Mental Health)

1350 CONNECTICUT AVE NW STE 1030
WASHINGTON, DC 20036

District of Columbia (202) 894-9307

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Margot Lamson's NPI number?

The NPI number for Margot Lamson is 1205212990. It was assigned to this individual provider in the NPPES registry on August 4, 2015.

Where is Margot Lamson located?

Margot Lamson practices at 1350 Connecticut Ave NW Ste 1030, Washington, DC 20036. The listed phone number is (202) 894-9307.

What is Margot Lamson's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Margot Lamson was last updated on August 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.