Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mattilee Marie Harrell-Johnson
Nurse's Aide in Wilmington, DE · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1427889526
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Registry record
Entity type Individual (Type 1)
Name Mattilee Marie Harrell-Johnson
Sex Female
Practice address 501 W 14th St, Wilmington, DE, 19801
Phone (302) 733-1000
Enumeration date Aug 10, 2024
Last updated in NPPES Aug 10, 2024
Taxonomy & licenses
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
How do I verify Mattilee Harrell-Johnson's NPI record?
Cross-check NPI 1427889526 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1427889526 active?
Yes, as of the latest NPPES snapshot, NPI 1427889526 is active (record last updated 2024-08-10).
Other providers at this practice address
Browse all → Robert Laskowski Geriatric Medicine (Internal Medicine) Physician · Wilmington, DE NPI 1477534907 Christiana Care Health Services Inc Ophthalmology Physician · Wilmington, DE NPI 1285619635 Christiana Care Health Services, Inc Psychiatry Physician · Wilmington, DE NPI 1083699433 David York Psychologist · Wilmington, DE NPI 1376528034 Christopher King Psychologist · Wilmington, DE NPI 1306821061 Wolfgang Berten Psychiatry Physician · Wilmington, DE NPI 1932184686 Harold Rosen Psychiatry Physician · Wilmington, DE NPI 1750366407 Alan Schwartz Psychologist · Wilmington, DE NPI 1598741100
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-10.