Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine F Holub-Smith, ARNP

Pediatric Nurse Practitioner in Concord, NH · enumerated 2006.

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

National Provider Identifier

1588635403

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Registry record

Entity type Individual (Type 1)

Name Catherine F Holub-Smith

Credential ARNP

Sex Female

Practice address 253 Pleasant St, Concord, NH, 03301

Phone (603) 226-2200

Fax (603) 640-1228

Enumeration date Jan 30, 2006

Last updated in NPPES Jan 8, 2026

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 018586-23-02 (NH) Primary

Other identifiers

Identifier	Type	State	Issuer
70001017	Medicaid	MD	-
2306155YPNH02	Other	NH	ANTHEM

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

Is NPI 1588635403 active?

Yes, as of the latest NPPES snapshot, NPI 1588635403 is active (record last updated 2026-01-08).

How do I verify Catherine Holub-Smith's NPI record?

Cross-check NPI 1588635403 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-08.