Marcus Williams
Behavior Technician · Groton, CT
Marcus Williams is a behavior technician with a practice address in Groton, Connecticut, and NPI 1205341138, issued on Dec 14, 2017. Check the license (Connecticut RBT-16-27657, as entered in NPPES) with the Connecticut board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Marcus Williams
- Primary taxonomy
- Behavior Technician 106S00000X
- License number
- RBT-16-27657 CT
Self-reported in NPPES; status is on the state search - Practice location
- 220 Route 12 Ste 205, Groton, CT 06340
- Phone
- (877) 315-8080
- Enumerated
- Dec 14, 2017
- Record last updated
- Dec 14, 2017 (not updated in 9 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest behavior technician records → All 1,896 in Connecticut → Look up another NPI →
Also registered at 220 Route 12 Ste 205
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan MurrayBehavior Technician1003779083
- Bobbi Peck, RBTBehavior Technician1194230482
- Julie SampsonBehavior Technician1497261275
- Chelsea ShawBehavior Technician1750896296
- Amanda WheelerBehavior Analyst1780171561
Verify Marcus Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license RBT-16-27657Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Marcus Williams among 1,896 behavior technician records in Connecticut
Marcus Williams is one of 1,896 behavior technician records with a practice address in Connecticut. under 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 2017, is newer than under 1% of them.
- NPI issued2017 · under 1% of these records are older, 99% newer
- In a Medicare fileNo · under 1% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2017 · 21% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 106S00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 behavior technician records list a practice address in Groton
They are 14 of the 734 NPPES records with a practice address in Groton, and 1,896 behavior technician records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,896 in Connecticut → Every provider in Groton → Behavior Technician nationwide →
The 8 behavior technician records with the nearest ZIP codes
- Kacelynn BanksGroton, CT 063401477405413
- Matthew BenjaminGroton, CT 063401639044316
- Kristina CartaGroton, CT 063401144735457
- Samantha GauthierGroton, CT 063401760357222
- Ashlee Hoitt, RBTGroton, CT 063401508650037
- Cassandra LaudanoGroton, CT 063401801712724
- Megan MurrayGroton, CT 063401003779083
- Bobbi Peck, RBTGroton, CT 063401194230482
Common questions
What is Marcus Williams's NPI number?
Marcus Williams's National Provider Identifier (NPI) is 1205341138, issued on Dec 14, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Marcus Williams located?
The NPPES record lists a practice address at 220 Route 12 Ste 205, Groton, CT, 06340. Phone: (877) 315-8080. Providers update this record themselves, so call before visiting.
How can I verify Marcus Williams's license?
NPPES lists Connecticut license number RBT-16-27657, as entered by the provider. Search the Connecticut 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.