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

Ms. Marcella Massenburg Atwater, PMHCNS-BC

Adult Psychiatric/Mental Health Clinical Nurse Specialist in Durham, NC · enumerated 2008.

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

National Provider Identifier

1700038353

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Registry record

Entity type Individual (Type 1)

Name Ms. Marcella Massenburg Atwater

Credential PMHCNS-BC

Sex Female

Practice address Durham, NC, 27703

Phone (919) 687-4013

Fax (919) 680-4010

Enumeration date Oct 15, 2008

Last updated in NPPES Sep 19, 2014

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

Taxonomy & licenses

163WP0809X Adult Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 069765 (NC) Secondary

364SP0809X Adult Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 69765 (NC) Primary

Other identifiers

Identifier	Type	State	Issuer
1700038353	Medicaid	NC	-

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

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 Marcella Atwater?

Marcella Atwater is registered in NPPES with the primary taxonomy of Adult Psychiatric/Mental Health Clinical Nurse Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-19.