Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stefan Domenikos

Registered Nurse in Portsmouth, NH · enumerated 2026.

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

National Provider Identifier

1689502866

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Registry record

Entity type Individual (Type 1)

Name Stefan Domenikos

Sex Male

Practice address 333 Borthwick Ave, Portsmouth, NH, 03801

Phone (603) 436-5110

Enumeration date May 11, 2026

Last updated in NPPES May 11, 2026

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 084242-21 (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

What specialty is Stefan Domenikos?

Stefan Domenikos is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-11.