Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Patricia Gillan, N.P, M.S., C.S.

Adult Psychiatric/Mental Health Clinical Nurse Specialist in Mattapan, MA · enumerated 2006 · practices at Neponset Health Center.

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

National Provider Identifier

1457428161

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Registry record

Entity type Individual (Type 1)

Name Ms. Patricia Gillan

Credential N.P, M.S., C.S.

Sex Female

Practice address 1135 Morton St, Mattapan, MA, 02126

Phone (617) 533-2400

Fax (617) 533-2401

Enumeration date Nov 29, 2006

Last updated in NPPES Sep 3, 2021

Taxonomy & licenses

364SP0807X Child & Adolescent Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 166491 (MA) Secondary

364SP0808X Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 166491 (MA) Secondary

364SP0809X Adult Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 166491 (MA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
1892819	Medicaid	MA	-
PN0539	Other	MA	BLUE CROSS BLUE SHIELD
166491	Other	MA	TUFTS

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

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.

What specialty is Patricia Gillan?

Patricia Gillan is registered in NPPES with the primary taxonomy of Adult Psychiatric/Mental Health Clinical Nurse Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-03.