Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mattie Holliday

Individual provider Intellectual & Developmental Disabilities Psychologist · NPI 1700484060

Mattie Holliday is an Intellectual & Developmental Disabilities Psychologist in Newark, Delaware. Practices as a sole proprietor. Licensed in Delaware.

Licensed in
DE
In the registry since
2020

Practice location Address checks out

16 Octave Ct
Newark, DE 19713-1915
Phone: (302) 377-5774
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Intellectual & Developmental Disabilities Psychologist (primary) Taxonomy 103TM1800X (DE)

Record details

NPI number1700484060
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedOctober 9, 2020
Last updated in NPPESOctober 9, 2020
Certification dateOctober 9, 2020
Mailing address16 Octave Ct, Newark, DE 19713-1915

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