Rosemary B. Mason, LCSW
Clinical Social Worker · Portland, ME
Rosemary B. Mason, LCSW is a clinical social worker with a practice address in Portland, Maine, and NPI 1669768800, issued on Jun 27, 2011. Check the license (Maine LC1137, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rosemary B. Mason
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- LC1137 ME
Self-reported in NPPES; status is on the state search - Practice location
- 165 Lancaster St, Portland, ME 04101
- Phone
- (207) 874-1030
- Enumerated
- Jun 27, 2011
- Record last updated
- Jan 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (207) 874-1044
- Medicare enrollment
- Enrolled (PECOS I20050527000449); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 3,673 in Maine → Look up another NPI →
Also registered at 165 Lancaster St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Meredith Anderson, LCSWClinical Social Worker1053613695
- Sumayya AyazChild & Adolescent Psychiatry Physician1316398647
- Emily Baronfeld, LCSWClinical Social Worker1861145658
- Katelyn Baxter-Musser, LCSWClinical Social Worker1437499886
- Erin Benner, LCSWClinical Social Worker1386979433
- Kathleen Bennett, M.S., CF -SLPSpeech-Language Pathologist1730755844
Verify Rosemary B. Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license LC1137Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- SweetserBrunswick, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rosemary B. Mason among 3,673 clinical social worker records in Maine
Rosemary B. Mason, LCSW is one of 3,673 clinical social worker records with a practice address in Maine. 19% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 49% of them.
- NPI issued2011 · 49% of these records are older, 47% newer
- In a Medicare fileYes · 19% of these records are
- In the CMS Doctors and Clinicians fileYes · 26% of these records are
- Graduated1980 · median 2008 among the 939 with a school on file
- Record last updated2015 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
669 clinical social worker records list a practice address in Portland
They are 669 of the 6,022 NPPES records with a practice address in Portland, and 3,673 clinical social worker records in Maine.
All 3,673 in Maine → Every provider in Portland → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Leslie Abrons, LCSWPortland, ME 041011295726180
- Franklin Brooks, PH.D., LCSWPortland, ME 041011437186103
- Mary-Margaret Christie, LCSWPortland, ME 041011750343935
- Thomas Glendon, L.C.S.W.Portland, ME 041011396704979
- Randall Melvin, LCSW BCDPortland, ME 041011669495974
- Claire Oppenheim, LCSWPortland, ME 041011538150438
- Amy Partridge-Barber, LCSWPortland, ME 041011700843703
- Ken Raffel, LCSWPortland, ME 041011952392847
Common questions
What is Rosemary B. Mason, LCSW's NPI number?
Rosemary B. Mason, LCSW's National Provider Identifier (NPI) is 1669768800, issued on Jun 27, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Rosemary B. Mason, LCSW located?
The NPPES record lists a practice address at 165 Lancaster St, Portland, ME, 04101. Phone: (207) 874-1030. Providers update this record themselves, so call before visiting.
How can I verify Rosemary B. Mason, LCSW's license?
NPPES lists Maine license number LC1137, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.