Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Peter O'Brien, MD

Surgery Physician in Sioux Falls, SD · enumerated 2006.

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

National Provider Identifier

1407803331

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Registry record

Entity type Individual (Type 1)

Name Peter O'Brien

Credential MD

Sex Male

Practice address 1201 S Euclid Ave, Ste 104, Sioux Falls, SD, 57105

Phone (605) 328-3840

Fax (605) 328-3841

Enumeration date May 27, 2006

Last updated in NPPES May 9, 2008

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 2030 (SD) Primary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 22313 (MN) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 24561 (IA) Secondary

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 1407803331 active?

Yes, as of the latest NPPES snapshot, NPI 1407803331 is active (record last updated 2008-05-09).

How do I verify Peter O'Brien's NPI record?

Cross-check NPI 1407803331 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 2008-05-09.