Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Williams, CASAC

Addiction (Substance Use Disorder) Counselor in West Seneca, NY · enumerated 2007 · practices at Renaissance Addiction Services, Inc..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1942407788

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Registry record

Entity type Individual (Type 1)

Name Michael Williams

Credential CASAC

Sex Male

Practice address 920 Harlem Rd, West Seneca, NY, 14224

Phone (716) 827-9462

Fax (716) 827-9465

Enumeration date Jun 27, 2007

Last updated in NPPES Apr 1, 2022

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 12639 (NY) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What specialty is Michael Williams?

Michael Williams is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Heather Mcgee Clinical Social Worker · West Seneca, NY NPI 1851472849 Anthony Carpenter Registered Nurse · Buffalo, NY NPI 1912252487 Renaissance Addiction Services, Inc. Children's Substance Abuse Rehabilitation Facility · West Seneca, NY NPI 1699197053 Valarie Guthrie-Potts Addiction (Substance Use Disorder) Counselor · West Seneca, NY NPI 1447735238 Bethany Morgan Case Manager/Care Coordinator · Buffalo, NY NPI 1548816218 Latasha Baker-Chappell Addiction (Substance Use Disorder) Counselor · West Seneca, NY NPI 1083254924 Janet Chan Registered Nurse · West Seneca, NY NPI 1891429460 Alexander Kavney Registered Nurse · Buffalo, NY NPI 1861278780

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-01.