Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Efficacy Inc.

Q: What is the NPI number for Efficacy Inc.?

The NPI for Efficacy Inc. is 1790041291, a Type 2 (organization) record in the CMS NPPES registry.

Professional Counselor in Washington, DC · enumerated 2012 · authorized official Graham Hall, Founder/Owner.

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

National Provider Identifier

1790041291

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Registry record

Entity type Organization (Type 2)

Legal business name Efficacy Inc.

Practice address 1010 Wisconsin Ave Nw, Suite 505, Washington, DC, 20007

Phone (301) 775-0946

Enumeration date Apr 9, 2012

Last updated in NPPES Apr 9, 2012

Taxonomy & classification

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License PRC14148 (DC) Primary

Authorized official

Name Graham Hall

Title Founder/Owner

Phone (301) 775-0946

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.

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Frequently asked questions

Who is the authorized official for Efficacy Inc.?

NPPES lists Graham Hall (Founder/Owner) as the authorized official for this organization.

What is the NPI number for Efficacy Inc.?

The NPI for Efficacy Inc. is 1790041291, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-04-09.