Margaret S. Mercer, LCSW
Clinical Social Worker · Portland, ME
Margaret S. Mercer, LCSW is a clinical social worker with a practice address in Portland, Maine, and NPI 1508001934, issued on Dec 15, 2008. Check the license (Maine LC24403, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret S. Mercer
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- LC24403 ME
CSW-1190 CO
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-2911
- Enumerated
- Dec 15, 2008
- Record last updated
- May 5, 2025
- Fax
- (207) 662-6006
- Medicare enrollment
- Enrolled (PECOS I20250512001026); 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 22 Bramhall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ruslan Abdukalikov, DOAnesthesiology Physician1831694793
- Tod Abrahams, M.D.Diagnostic Radiology Physician1538231642
- Joshua Abrams, PA-CSurgical Physician Assistant1932832128
- Christopher Abruzzese, D.OAnesthesiology Physician1558789305
- Haley Acker, PA-CPhysician Assistant1972167377
Verify Margaret S. Mercer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license LC24403Check 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
- The Counseling Center OF Nashua IncScarborough, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret S. Mercer among 3,673 clinical social worker records in Maine
Margaret S. Mercer, 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 2008, is newer than 33% of them.
- NPI issued2008 · 33% of these records are older, 63% newer
- In a Medicare fileYes · 19% of these records are
- In the CMS Doctors and Clinicians fileYes · 26% of these records are
- Graduated2006 · median 2008 among the 939 with a school on file
- Record last updated2025 · 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
- Tina Cole, LCSWPortland, ME 041021669420592
- Debra Davis, LCSWPortland, ME 041021801814025
- William Eldridge, LCSWPortland, ME 041021235141680
- Anne Freedman, LCSWPortland, ME 041021689682809
- John Green, LCSWPortland, ME 041021184683468
- Ellen Gurney, LCSWPortland, ME 041021033196340
- Caroline Houppert, LCSWPortland, ME 041021306861224
- Frank Knowles, LCSWPortland, ME 041021699884569
Common questions
What is Margaret S. Mercer, LCSW's NPI number?
Margaret S. Mercer, LCSW's National Provider Identifier (NPI) is 1508001934, issued on Dec 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Margaret S. Mercer, LCSW located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-2911. Providers update this record themselves, so call before visiting.
How can I verify Margaret S. Mercer, LCSW's license?
NPPES lists Maine license number LC24403, 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.