Karen Kieffer
Clinical Social Worker · Harvard, MA
Karen Kieffer is a clinical social worker with a practice address in Harvard, Massachusetts, and NPI 1750942371, issued on Jun 25, 2019. Check the license (Massachusetts 224364, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen Kieffer
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 224364 MA
Self-reported in NPPES; status is on the state search - Practice location
- 257 Ayer RD, Harvard, MA 01451
- Phone
- (978) 772-1846
- Enumerated
- Jun 25, 2019
- Record last updated
- Jun 25, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20241112000795); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 17,815 in Massachusetts → Look up another NPI →
Also registered at 257 Ayer RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Leslie Ekings, LICSWClinical Social Worker1558339929
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Verify Karen Kieffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 224364Check 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
- Northeast Health Services LLCWoburn, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Kieffer among 17,815 clinical social worker records in Massachusetts
Karen Kieffer 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. Its NPI, issued in 2019, is newer than 77% of them.
- NPI issued2019 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 8% of these records are
- In the CMS Doctors and Clinicians fileYes · 17% of these records are
- Graduated2018 · median 2004 among the 3,059 with a school on file
- Record last updated2019 · 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).
19 clinical social worker records list a practice address in Harvard
They are 19 of the 100 NPPES records with a practice address in Harvard, and 17,815 clinical social worker records in Massachusetts.
All 17,815 in Massachusetts → Every provider in Harvard → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Kristen Barrett, LICSWHarvard, MA 014511447431176
- Frances Booth, LICSWHarvard, MA 014511295748515
- Lisa Briggs, M.S.W.Harvard, MA 014511245556836
- Diana Demetri, LICSWHarvard, MA 014511285965913
- Leslie Ekings, LICSWHarvard, MA 014511558339929
- Linda Ferguson, LICSWHarvard, MA 014511053403295
- Barbara Kirwood, LICSWHarvard, MA 014511730295452
- Rosemary Kolanowski, LICSWHarvard, MA 014511578663936
Common questions
What is Karen Kieffer's NPI number?
Karen Kieffer's National Provider Identifier (NPI) is 1750942371, issued on Jun 25, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Karen Kieffer located?
The NPPES record lists a practice address at 257 Ayer RD, Harvard, MA, 01451. Phone: (978) 772-1846. Providers update this record themselves, so call before visiting.
How can I verify Karen Kieffer's license?
NPPES lists Massachusetts license number 224364, 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. 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.