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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Ann F Castle, R.N.

Psychiatric/Mental Health Registered Nurse in Boston, MA · enumerated 2006.

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

National Provider Identifier

1083644256

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Registry record

Entity type Individual (Type 1)
Name Ms. Ann F Castle
Credential R.N.
Sex Female
Practice address 30 Northampton Street, Boston, MA, 02118
Phone (617) 433-9601
Fax (617) 445-6538
Enumeration date Jul 4, 2006
Last updated in NPPES Oct 22, 2015

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 138412 (MA) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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

How do I verify Ann Castle's NPI record?
Cross-check NPI 1083644256 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1083644256 active?
Yes, as of the latest NPPES snapshot, NPI 1083644256 is active (record last updated 2015-10-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-22.