Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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John Calvin O'Neil Jr., LCSW, LADC

Individual provider Clinical Social Worker · NPI 1457167769

John Calvin O'Neil Jr., LCSW, LADC is a Clinical Social Worker in Milford, Connecticut. Practices as a sole proprietor. Licensed in Connecticut and Vermont.

Licensed in
CT, VT
In the registry since
2024
Specialties on file
3
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.
LADC — Licensed Alcohol and Drug Counselor
A licensed addiction counsellor.

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Practice location Address checks out

86 Cherry St Fl 2
Milford, CT 06460-3413
Phone: (203) 249-7837
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 012916 (CT)
Clinical Social Worker Taxonomy 1041C0700X · Licence 089.0136543TELE (VT)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence 001419 (CT)

Record details

NPI number1457167769
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW , LADC
Sole proprietorYes
NPI enumeratedDecember 10, 2024
Last updated in NPPESOctober 3, 2025
Certification dateOctober 3, 2025

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