Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Grant Charles O'Brien, D.C.

Chiropractor in Neenah, WI · enumerated 2009 · practices at Align Chiropractic LLC.

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

National Provider Identifier

1851628283

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Registry record

Entity type Individual (Type 1)

Name Dr. Grant Charles O'Brien

Credential D.C.

Sex Male

Practice address 200 W Wisconsin Ave, Neenah, WI, 54956

Phone (920) 720-6300

Fax (920) 720-6315

Enumeration date Nov 5, 2009

Last updated in NPPES Feb 12, 2010

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 4582-12 (WI) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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 1851628283 active?

Yes, as of the latest NPPES snapshot, NPI 1851628283 is active (record last updated 2010-02-12).

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

Cross-check NPI 1851628283 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Align Chiropractic LLC Chiropractor · Neenah, WI NPI 1851623052 Tessa Loewe Massage Therapist · Neenah, WI NPI 1629377049 Courtney Cowie Massage Therapist · Neenah, WI NPI 1770919110

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-12.