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

Diane Fontneau, LADC

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1366990426

Diane Fontneau, LADC is an Addiction (Substance Use Disorder) Counselor in Portsmouth, New Hampshire. Licensed in New Hampshire. Registered with an NPI since 2016.

Licensed in
NH
In the registry since
2016
Specialties on file
3
What do these letters mean?
LADC — Licensed Alcohol and Drug Counselor
A licensed addiction counsellor.

See every abbreviation used in this directory →

Practice location Address checks out

1145 Sagamore Ave
Portsmouth, NH 03801-5503
Phone: (603) 431-6703
Fax: (603) 430-3753
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence 1180 (NH)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence 1002 (NH)
Mental Health Counselor Taxonomy 101YM0800X (NH)

Record details

NPI number1366990426
Entity typeIndividual (Type 1)
GenderFemale
Credentials LADC
Sole proprietorNo
NPI enumeratedSeptember 19, 2016
Last updated in NPPESMarch 23, 2023
Certification dateMarch 23, 2023

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