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

James Matthew Duffy, LCADC

Q: What is the NPI number for James Duffy?

The National Provider Identifier (NPI) for James Duffy is 1750938783, a Type 1 (individual) record in the CMS NPPES registry.

Addiction (Substance Use Disorder) Counselor in Lusby, MD · enumerated 2019 · practices at Calvert County Health Department.

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

National Provider Identifier

1750938783

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Registry record

Entity type Individual (Type 1)

Name James Matthew Duffy

Credential LCADC

Sex Male

Practice address Lusby, MD, 20657

Phone (410) 394-0681

Fax (410) 326-1860

Enumeration date Aug 23, 2019

Last updated in NPPES Aug 23, 2019

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License LCA1618 (MD) Primary

Other identifiers

Identifier	Type	State	Issuer
LCA1618	Other	MD	LICENSE

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 James Duffy practice?

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

What is the NPI number for James Duffy?

The National Provider Identifier (NPI) for James Duffy is 1750938783, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Jordan Truitt Addiction (Substance Use Disorder) Counselor · Lusby, MD NPI 1851806186 Sarah Ayers Social Worker · Lusby, MD NPI 1043868557 Calvert County Health Department Mental Health Clinic/Center (Including Community Mental Health Center) · Lusby, MD NPI 1346891025 Cassandra Barron Marriage & Family Therapist · Lusby, MD NPI 1053903872 Meghan Smith Clinical Social Worker · Lusby, MD NPI 1699494674 Brittany Turner Social Worker · Lusby, MD NPI 1417792391

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-23.