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

Mark S O'Neill, LICSW

Individual provider Clinical Social Worker · NPI 1326428517

Mark S O'Neill, LICSW is a Clinical Social Worker in Providence, Rhode Island. Qualified in 2009, 17 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in Rhode Island.

Years since qualifying
17
Licensed in
RI
In the registry since
2015
What do these letters mean?
LICSW — Licensed Independent Clinical Social Worker
The title some states use for an independently practising clinical social worker.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

70 Oak St Apt C
Providence, RI 02909-1932
Phone: (401) 237-2203
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence ISW02402 (RI)

Record details

NPI number1326428517
Entity typeIndividual (Type 1)
GenderMale
Credentials LICSW
Sole proprietorYes
NPI enumeratedJune 3, 2015
Last updated in NPPESJuly 8, 2021
Certification dateJuly 8, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Providence