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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Alissa Williams I, PSYD

Mental Health Counselor in Salem, NH · enumerated 2008.

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

National Provider Identifier

1285884700

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Registry record

Entity type Individual (Type 1)
Name Dr. Alissa Williams I
Credential PSYD
Sex Female
Practice address Salem, NH, 03079
Phone (603) 893-7700
Enumeration date Sep 19, 2008
Last updated in NPPES May 5, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Primary
PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

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

How do I verify Alissa Williams's NPI record?
Cross-check NPI 1285884700 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1285884700 active?
Yes, as of the latest NPPES snapshot, NPI 1285884700 is active (record last updated 2022-05-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-05.