Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Barbara E Duffy, CRNP-PMH

Psychiatric/Mental Health Nurse Practitioner in Towson, MD · enumerated 2008.

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

National Provider Identifier

1841460086

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Registry record

Entity type Individual (Type 1)

Name Barbara E Duffy

Credential CRNP-PMH

Sex Female

Practice address 901 Dulaney Valley Rd, Suite 129, Towson, MD, 21204

Phone (410) 832-2729

Fax (410) 832-5783

Enumeration date Mar 4, 2008

Last updated in NPPES Apr 30, 2014

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License R126340 (MD) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R126340 (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 specialty is Barbara Duffy?

Barbara Duffy is registered in NPPES with the primary taxonomy of Psychiatric/Mental Health Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-30.