Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Hjalti Mar Thorisson, MD

Student in an Organized Health Care Education/Training Program in New Haven, CT · enumerated 2007.

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

National Provider Identifier

1124202205

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Registry record

Entity type Individual (Type 1)

Name Dr. Hjalti Mar Thorisson

Credential MD

Sex Male

Practice address 20 York Street T-209, Yale-New Haven Hospital, New Haven, CT, 06510

Phone (203) 688-2259

Fax (203) 688-5599

Enumeration date Dec 24, 2007

Last updated in NPPES Dec 24, 2007

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 1124202205 active?

Yes, as of the latest NPPES snapshot, NPI 1124202205 is active (record last updated 2007-12-24).

How do I verify Hjalti Thorisson's NPI record?

Cross-check NPI 1124202205 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 2007-12-24.