NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Timothy E O'Brien, D.AC.

Acupuncturist in West Greenwich, RI · enumerated 2006.

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

National Provider Identifier

1538221668

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Timothy E O'Brien
Credential D.AC.
Sex Male
Practice address 66 Nooseneck Hill Rd, Opus Acupuncture, West Greenwich, RI, 02817
Phone (401) 397-6333
Enumeration date Dec 14, 2006
Last updated in NPPES Dec 23, 2009

Taxonomy & licenses

171100000X Acupuncturist Other Service Providers · License DA00149 (RI) Primary

Other identifiers

Identifier Type State Issuer
DA001491 Other RI ACUPUNCTURE

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 Timothy O'Brien?
Timothy O'Brien is registered in NPPES with the primary taxonomy of Acupuncturist. 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.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-23.