Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Cynthia H Obrien, CRNP
Nurse Practitioner in Largo, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1912075359
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Registry record
Entity type Individual (Type 1)
Name Ms. Cynthia H Obrien
Credential CRNP
Sex Female
Practice address 1221 Mercantile Ln, Largo, MD, 20774
Phone (301) 618-5929
Enumeration date Dec 2, 2006
Last updated in NPPES Jun 2, 2021
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R093367 (MD) 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.
Frequently asked questions
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.
What specialty is Cynthia Obrien?
Cynthia Obrien is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-02.