Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Maureen O'Brien, RD
Registered Dietitian in Newark, DE · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1558539817
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Registry record
Entity type Individual (Type 1)
Name Maureen O'Brien
Credential RD
Sex Female
Practice address 4755 Ogletown Stanton Road, Newark, DE, 19718
Phone (302) 733-4152
Fax (302) 623-0669
Enumeration date Feb 20, 2008
Last updated in NPPES Jun 25, 2008
Taxonomy & licenses
133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License DN0000264 (DE) Primary
RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration.
About the RD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| DN0000264 | Other | DE | LICENSE |
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.
Frequently asked questions
Is NPI 1558539817 active?
Yes, as of the latest NPPES snapshot, NPI 1558539817 is active (record last updated 2008-06-25).
How do I verify Maureen O'Brien's NPI record?
Cross-check NPI 1558539817 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-25.