Mark Jacob Longsjo, LICSW
Clinical Social Worker · Brockton, MA
Mark Jacob Longsjo, LICSW is a clinical social worker with a practice address in Brockton, Massachusetts, and NPI 1013949809, issued on Jul 6, 2006. Check the license (Massachusetts 1026908, as entered in NPPES) with the Massachusetts board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Jacob Longsjo
- Credential
- LICSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 1026908 MA
Self-reported in NPPES; status is on the state search - Practice location
- Mclean Hospital Southeast Location, Brockton, MA 02301
- Phone
- (508) 894-8320
- Enumerated
- Jul 6, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (508) 894-8334
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 17,815 in Massachusetts → Look up another NPI →
Also registered at Mclean Hospital Southeast Location
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Curcuru, LICSWClinical Social Worker1508897513
- John Knox, LICSWClinical Social Worker1730221755
- Joan Kovach, APRN, BCClinical Nurse Specialist1467483230
- Katherine Linscott, LICSWClinical Social Worker1295767085
- Jill Marciello, LICSWClinical Social Worker1497786271
- Maryellen McGrath-Howie, LICSWClinical Social Worker1013071315
Verify Mark Jacob Longsjo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 1026908Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Jacob Longsjo among 17,815 clinical social worker records in Massachusetts
Mark Jacob Longsjo, LICSW is one of 17,815 clinical social worker records with a practice address in Massachusetts. 8% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than under 1% of them.
- NPI issued2006 · under 1% of these records are older, 85% newer
- In a Medicare fileNo · 8% of these records are
- In the CMS Doctors and Clinicians fileNo · 17% of these records are
- Record last updated2007 · 68% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
380 clinical social worker records list a practice address in Brockton
They are 380 of the 4,287 NPPES records with a practice address in Brockton, and 17,815 clinical social worker records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,815 in Massachusetts → Every provider in Brockton → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Carl Aveni, MSW LICSWBrockton, MA 023011174637086
- Richard Curcuru, LICSWBrockton, MA 023011508897513
- Stacey Edwards, LICSWBrockton, MA 023011184739625
- Thalia Falcon, MSW, LCSWBrockton, MA 023011649381336
- Jennifer Fine, LICSWBrockton, MA 023011104863497
- Jose Gutierrez, MSW (LICSW)Brockton, MA 023011720197981
- Katherine Linscott, LICSWBrockton, MA 023011295767085
- Debora Lynn, PHDBrockton, MA 023011275542094
Common questions
What is Mark Jacob Longsjo, LICSW's NPI number?
Mark Jacob Longsjo, LICSW's National Provider Identifier (NPI) is 1013949809, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Jacob Longsjo, LICSW located?
The NPPES record lists a practice address at Mclean Hospital Southeast Location, Brockton, MA, 02301. Phone: (508) 894-8320. Providers update this record themselves, so call before visiting.
How can I verify Mark Jacob Longsjo, LICSW's license?
NPPES lists Massachusetts license number 1026908, as entered by the provider. Search the Massachusetts 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. 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.