Nancy Larkin Williamson, M.ED. CCC/SLP
Speech-Language Pathologist · Dedham, MA
Nancy Larkin Williamson, M.ED. CCC/SLP is a speech-language pathologist with a practice address in Dedham, Massachusetts, and NPI 1790014736, issued on Dec 22, 2009. Check the license (Massachusetts 1543, 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
- Nancy Larkin Williamson
- Credential
- M.ED. CCC/SLP
- Primary taxonomy
- Speech-Language Pathologist 235Z00000X
- License number
- 1543 MA
Self-reported in NPPES; status is on the state search - Practice location
- 597 High St, Dedham, MA 02026
- Phone
- (781) 329-2262
- Enumerated
- Dec 22, 2009
- Record last updated
- Dec 22, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (781) 329-2207
- Entity
- Type 1 · individual
8 nearest speech-language pathologist records → All 3,980 in Massachusetts → Look up another NPI →
Also registered at 597 High St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Jackson, MA, CCC-SLPSpeech-Language Pathologist1972760171
- Jordan Piel, MSSpeech-Language Pathologist1457522153
- Barbara Wilson Arboleda, MS CCC-SLPSpeech-Language Pathologist1659598472
Verify Nancy Larkin Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 1543Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Nancy Larkin Williamson among 3,980 speech-language pathologist records in Massachusetts
Nancy Larkin Williamson, M.ED. CCC/SLP is one of 3,980 speech-language pathologist records with a practice address in Massachusetts. 1% 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 2009, is newer than 27% of them.
- NPI issued2009 · 27% of these records are older, 69% newer
- In a Medicare fileNo · 1% of these records are
- In the CMS Doctors and Clinicians fileNo · 3% of these records are
- Record last updated2009 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 235Z00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 speech-language pathologist records list a practice address in Dedham
They are 20 of the 876 NPPES records with a practice address in Dedham, and 3,980 speech-language pathologist records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,980 in Massachusetts → Every provider in Dedham → Speech-Language Pathologist nationwide →
The 8 speech-language pathologist records with the nearest ZIP codes
- Melissa BradburyDedham, MA 020261396448486
- Shane FitzgeraldDedham, MA 020261669082657
- Edith Graichen, M.S. CCC-SLPDedham, MA 020261508070384
- Jennifer Jackson, MA, CCC-SLPDedham, MA 020261972760171
- Jennifer Llado, CCC-SLPDedham, MA 020261194948554
- Marie Naughton, CCC-SPDedham, MA 020261932141678
- Lisbeth PetrozzaDedham, MA 020261063987535
- Jordan Piel, MSDedham, MA 020261457522153
Common questions
What is Nancy Larkin Williamson, M.ED. CCC/SLP's NPI number?
Nancy Larkin Williamson, M.ED. CCC/SLP's National Provider Identifier (NPI) is 1790014736, issued on Dec 22, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Larkin Williamson, M.ED. CCC/SLP located?
The NPPES record lists a practice address at 597 High St, Dedham, MA, 02026. Phone: (781) 329-2262. Providers update this record themselves, so call before visiting.
How can I verify Nancy Larkin Williamson, M.ED. CCC/SLP's license?
NPPES lists Massachusetts license number 1543, 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.