Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Allison L O'Brien, DMD

General Practice Dentistry in Lakewood Ranch, FL · enumerated 2008 · practices at O'Brien Smiles, Pllc.

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

National Provider Identifier

1225292840

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Allison L O'Brien

Credential DMD

Sex Female

Practice address Lakewood Ranch, FL, 34202

Phone (941) 373-3904

Fax (941) 907-0565

Enumeration date Jul 13, 2008

Last updated in NPPES May 14, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 18536 (FL) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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

What is the NPI number for Allison O'Brien?

The National Provider Identifier (NPI) for Allison O'Brien is 1225292840, a Type 1 (individual) record in the CMS NPPES registry.

Where does Allison O'Brien practice?

The practice location on file with NPPES is in Lakewood Ranch, FL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

O'Brien Smiles, Pllc Dentist · Lakewood Rch, FL NPI 1427401405

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-14.