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

Mr. Darren Michael O'Brien, MA LLP

Community/Behavioral Health Agency in Chesterfield, MI · enumerated 2007.

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

National Provider Identifier

1427199892

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Registry record

Entity type Individual (Type 1)

Name Mr. Darren Michael O'Brien

Credential MA LLP

Sex Male

Practice address Chesterfield, MI, 48051

Phone (586) 948-0228

Fax (586) 948-0213

Enumeration date Feb 9, 2007

Last updated in NPPES Sep 7, 2023

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

Taxonomy & licenses

251S00000X Community/Behavioral Health Agency Agencies Primary

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

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

Cross-check NPI 1427199892 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1427199892 active?

Yes, as of the latest NPPES snapshot, NPI 1427199892 is active (record last updated 2023-09-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-07.