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

Individual provider Clinical Social Worker · NPI 1669768800

Rosemary B. Mason, LCSW is a Clinical Social Worker in Portland, Maine. Qualified in 1980, 46 years ago. Practices with Sweetser, a 138-clinician group and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
46
Licensed in
ME
In the registry since
2011
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

165 Lancaster St
Portland, ME 04101-2406 Not confirmed with CMS for 11 years — call before visiting
Phone: (207) 874-1030
Fax: (207) 874-1044
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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 LC1137 (ME)

Record details

NPI number1669768800
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedJune 27, 2011
Last updated in NPPESJanuary 23, 2015

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 1980 (46 years in practice)
Group practice Sweetser — 138 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Colleagues at Sweetser

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 138 clinicians in the practice; 12 are shown here.

Other providers in Portland