Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Anthony Guzman

Addiction (Substance Use Disorder) Registered Nurse in Onalaska, WI · enumerated 2022.

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

National Provider Identifier

1699413500

Verified

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Registry record

Entity type Individual (Type 1)

Name Anthony Guzman

Sex Male

Practice address 9532 E 16 Frontage Rd, Onalaska, WI, 54650

Phone (608) 783-0506

Enumeration date May 23, 2022

Last updated in NPPES May 23, 2022

Taxonomy & licenses

163WA0400X Addiction (Substance Use Disorder) Registered Nurse Nursing Service Providers · License 149882-30 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
1003150004	Medicaid	WI	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Anthony Guzman?

Anthony Guzman is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Registered Nurse. 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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Ams of Wisconsin, LLC Methadone Clinic · Onalaska, WI NPI 1003150004 Melissa Northwood Addiction (Substance Use Disorder) Registered Nurse · Onalaska, WI NPI 1396180691 Justin Rooney Addiction (Substance Use Disorder) Counselor · Onalaska, WI NPI 1831539097 Janet Verthein Addiction (Substance Use Disorder) Counselor · Onalaska, WI NPI 1558793620 Jennifer Sobolewski Addiction (Substance Use Disorder) Counselor · Onalaska, WI NPI 1205269420 Jonathan Sabin Addiction (Substance Use Disorder) Counselor · Onalaska, WI NPI 1578975447 Ams of Wisconsin Mental Health Clinic/Center (Including Community Mental Health Center) · Onalaska, WI NPI 1568879971 Greggory Scharf Addiction (Substance Use Disorder) Counselor · Onalaska, WI NPI 1598172918

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-23.