Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diana L O'Neil

Q: What is the NPI number for Diana O'Neil?

The National Provider Identifier (NPI) for Diana O'Neil is 1851718639, a Type 1 (individual) record in the CMS NPPES registry.

Physician Assistant in Concord, NH · enumerated 2014.

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

National Provider Identifier

1851718639

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Registry record

Entity type Individual (Type 1)

Name Diana L O'Neil

Sex Female

Practice address 246 Pleasant St Bldg West, Concord, NH, 03301

Phone (603) 224-6070

Fax (603) 227-7555

Enumeration date Mar 18, 2014

Last updated in NPPES Oct 7, 2024

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA4932 (MA) Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 1244 (NH) 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

Where does Diana O'Neil practice?

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

What is the NPI number for Diana O'Neil?

The National Provider Identifier (NPI) for Diana O'Neil is 1851718639, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-07.