Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marni Gwyther Holder, RN, FNP

Family Nurse Practitioner in Carrboro, NC · enumerated 2007 · practices at Piedmont Health Services, Inc.

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

National Provider Identifier

1508987926

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Registry record

Entity type Individual (Type 1)

Name Ms. Marni Gwyther Holder

Credential RN, FNP

Sex Female

Practice address 299 Lloyd St, Carrboro, NC, 27510

Phone (919) 933-8494

Fax (919) 933-9201

Enumeration date Apr 3, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 151219 (NC) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier	Type	State	Issuer
200912	Other	NC	NC MEDICAL BOARD NUMBER

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 specialty is Marni Holder?

Marni Holder is registered in NPPES with the primary taxonomy of Family Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Su Cartmell Gerontology Nurse Practitioner · Carrboro, NC NPI 1184722605 Heather Miranda Registered Dietitian · Carrboro, NC NPI 1780709188 Melissa Marquez Clinical Social Worker · Carrboro, NC NPI 1962713586 Piedmont Health Services, Inc Primary Care Clinic/Center · Carrboro, NC NPI 1558761023 Lucy Angle Physician Assistant · Carrboro, NC NPI 1528519261

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.