Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Coolidge, ARNP

Nurse Practitioner in Somersworth, NH · enumerated 2006.

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

National Provider Identifier

1821023045

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Registry record

Entity type Individual (Type 1)

Name Catherine Coolidge

Credential ARNP

Sex Female

Practice address 255 Route 108, Somersworth, NH, 03878

Phone (603) 692-3166

Fax (833) 944-2258

Enumeration date Jul 12, 2006

Last updated in NPPES Feb 22, 2022

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 039968-23 (NH) Primary

Other identifiers

Identifier	Type	State	Issuer
3076160	Medicaid	NH	-

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 Catherine Coolidge practice?

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

What is the NPI number for Catherine Coolidge?

The National Provider Identifier (NPI) for Catherine Coolidge is 1821023045, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Bertrand Cole Addiction Medicine (Preventive Medicine) Physician · Somersworth, NH NPI 1184618852 John Athans Anatomic Pathology Physician · Somersworth, NH NPI 1407847528 Lawrence Epstein Addiction Medicine (Internal Medicine) Physician · Somersworth, NH NPI 1982664587 Richard Renner Medical Physician Assistant · Somersworth, NH NPI 1184670101 Edwin Charle Family Medicine Physician · Somersworth, NH NPI 1003859422 Daniel Graubert Pain Medicine (Anesthesiology) Physician · Somersworth, NH NPI 1760418750 Barbara Nadeau Medical Physician Assistant · Somersworth, NH NPI 1497781173 Marjorie Pelletier Family Nurse Practitioner · Somersworth, NH NPI 1942235999

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-02-22.