Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Richard Arnold, FNP, BC

Family Nurse Practitioner in Watertown, MA · enumerated 2006.

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

National Provider Identifier

1659344646

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Registry record

Entity type Individual (Type 1)

Name Richard Arnold

Credential FNP, BC

Sex Male

Practice address 23 Gleason St Watertown Ma 02472, Watertown, MA, 02472

Phone (617) 458-1694

Enumeration date Feb 9, 2006

Last updated in NPPES Oct 27, 2025

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 212402 (MA) Primary

FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential

Other identifiers

Identifier	Type	State	Issuer
NP3454	Other	MA	BLUE CROSS

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

How do I verify Richard Arnold's NPI record?

Cross-check NPI 1659344646 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1659344646 active?

Yes, as of the latest NPPES snapshot, NPI 1659344646 is active (record last updated 2025-10-27).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-27.