Louis D. Duncan, MA CCC SLP
Speech-Language Pathologist · Concord, MA
Louis D. Duncan, MA CCC SLP is a speech-language pathologist with a practice address in Concord, Massachusetts, and NPI 1831358316, issued on Jun 9, 2008. Check the license (Massachusetts SP6808SL, 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
- Louis D. Duncan
- Credential
- MA CCC SLP
- Primary taxonomy
- Speech-Language Pathologist 235Z00000X
- License number
- SP6808SL MA
Self-reported in NPPES; status is on the state search - Practice location
- 785 Main St, Concord, MA 01742
- Phone
- (978) 369-6889
- Enumerated
- Jun 9, 2008
- Record last updated
- Jun 9, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 785 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ruth LievanoSpeech-Language Pathologist1205095213
Verify Louis D. Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license SP6808SLCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36 speech-language pathologist records list a practice address in Concord
They are 36 of the 1,078 NPPES records with a practice address in Concord, 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 36 in Concord → All 3,980 in Massachusetts → Every provider in Concord →
Other speech-language pathologist records in Massachusetts
- Brianna Abbas, MS, CCC-SLPDartmouth, MA1013757616
- Mary Abbott, CCC/SLPAmherst, MA1518067263
- Anna AbboudBrookline, MA1972154581
- Amy AbdallaDartmouth, MA1356637730
- Linda Abdelahad, MED,CCC,SLPBrockton, MA1063525400
- Ahmed Abdelal, PH.D., CCCPlymouth, MA1689718876
- Maria Abdo, M.S., CCC-SLPWaltham, MA1306325642
- Sheeva Abolhassani, SHEEVA ABOLHASSANIDracut, MA1174814198
- Salma Abounadi, MS CCC SLPChelmsford, MA1295076180
- Julia AbovichSomerville, MA1831917541
Common questions
What is Louis D. Duncan, MA CCC SLP's NPI number?
Louis D. Duncan, MA CCC SLP's National Provider Identifier (NPI) is 1831358316, issued on Jun 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Louis D. Duncan, MA CCC SLP located?
The NPPES record lists a practice address at 785 Main St, Concord, MA, 01742. Phone: (978) 369-6889. Providers update this record themselves, so call before visiting.
How can I verify Louis D. Duncan, MA CCC SLP's license?
NPPES lists Massachusetts license number SP6808SL, 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.