NPPES file of Aug 9, 2026

William Colson, LADC

Addiction (Substance Use Disorder) Counselor · Waterbury, CT

William Colson, LADC is an addiction (substance use disorder) counselor with a practice address in Waterbury, Connecticut, and NPI 1154466795, issued on Feb 21, 2007. Check the license (Connecticut 000750, 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.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1154466795
Name
William Colson
Credential
LADC
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
License number
000750 CT
Self-reported in NPPES; status is on the state search
Practice location
228 Meadow St, Waterbury, CT 06702
Phone
(203) 597-0643
Enumerated
Feb 21, 2007
Record last updated
Apr 18, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(023) 597-0834
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest addiction (substance use disorder) counselor records → All 759 in Connecticut → Look up another NPI →

Also registered at 228 Meadow St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Chananya Abraham, LPC, MSMental Health Counselor1710380019
  2. Rachel Gilbert, M.S.Counselor1154780377
  3. Scott Nelson, LCSWClinical Social Worker1215121009
  4. Michael Norton, LCSWClinical Social Worker1023128139
  5. Blake Reuter, LPCMental Health Counselor1114318789
  6. Kendall Richardson, LADCAddiction (Substance Use Disorder) Counselor1730251240

Verify William Colson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
    Search for license 000750    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Connecticut license search

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William Colson among 759 addiction (substance use disorder) counselor records in Connecticut

William Colson, LADC is one of 759 addiction (substance use disorder) counselor records with a practice address in Connecticut. 6% 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 2007, is newer than 9% of them.

  • NPI issued2007 · 9% of these records are older, 79% newer
  • In a Medicare fileNo · 6% of these records are
  • In the CMS Doctors and Clinicians fileNo · 9% of these records are
  • Record last updated2013 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YA0400X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

53 addiction (substance use disorder) counselor records list a practice address in Waterbury

They are 53 of the 3,148 NPPES records with a practice address in Waterbury, and 759 addiction (substance use disorder) counselor records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 759 in Connecticut → Every provider in Waterbury → Addiction (Substance Use Disorder) Counselor nationwide →

The 8 addiction (substance use disorder) counselor records with the nearest ZIP codes

  1. Mario Barbpza, CACWaterbury, CT 067021821119207
  2. Timothy CunninghamWaterbury, CT 067021922252352
  3. Vincent Delaney, CCDO,CCDPWaterbury, CT 067021467788844
  4. Doug Gruber, LADCWaterbury, CT 067021992076780
  5. Edgar Jimenez, CADCWaterbury, CT 067021205019569
  6. Jannet Jones, LADCWaterbury, CT 067021770813669
  7. Danielle Mastriano, MSW,BA,LMSW,LADCWaterbury, CT 067021346590601
  8. David MercadoWaterbury, CT 067021326229857

Common questions

What is William Colson, LADC's NPI number?

William Colson, LADC's National Provider Identifier (NPI) is 1154466795, issued on Feb 21, 2007. An NPI identifies a provider in billing; it is not a license.

Where is William Colson, LADC located?

The NPPES record lists a practice address at 228 Meadow St, Waterbury, CT, 06702. Phone: (203) 597-0643. Providers update this record themselves, so call before visiting.

How can I verify William Colson, LADC's license?

NPPES lists Connecticut license number 000750, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.