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Dr. David Patrick O'Brien IV, MD

Colon & Rectal Surgery Physician in Portland, OR · enumerated 2006.

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

National Provider Identifier

1669440350

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Registry record

Entity type Individual (Type 1)
Name Dr. David Patrick O'Brien IV
Credential MD
Sex Male
Practice address 4805 Ne Glisan St, Suite 6n60, Portland, OR, 97213
Phone (503) 281-0561
Fax (503) 416-7377
Enumeration date Mar 9, 2006
Last updated in NPPES May 14, 2026

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD28214 (OR) Secondary
208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License MD28214 (OR) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
272697 Medicaid OR -
8508939 Medicaid WA -

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.

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Frequently asked questions

What specialty is David O'Brien?
David O'Brien is registered in NPPES with the primary taxonomy of Colon & Rectal Surgery Physician. 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 2026-05-14.