Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Abigail Viohl, LSW

Social Worker in Mchenry, IL · enumerated 2009.

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

National Provider Identifier

1679707608

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Registry record

Entity type Individual (Type 1)

Name Abigail Viohl

Credential LSW

Sex Female

Practice address 4100 Veterans Pkwy, Mchenry, IL, 60050

Phone (815) 385-6400

Enumeration date May 5, 2009

Last updated in NPPES May 5, 2009

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 150.011728 (IL) 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 Abigail Viohl?

Abigail Viohl is registered in NPPES with the primary taxonomy of Social Worker. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-05-05.