Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Joanne Marie Haag, COTA

Occupational Therapy Assistant in Watertown, WI · enumerated 2007 · practices at Marquardt Memorial Manor, Inc..

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

National Provider Identifier

1336351980

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Registry record

Entity type Individual (Type 1)

Name Ms. Joanne Marie Haag

Credential COTA

Sex Female

Practice address 1020 Hill St, Watertown, WI, 53098

Phone (920) 206-4935

Fax (920) 206-4986

Enumeration date May 4, 2007

Last updated in NPPES Feb 21, 2013

Taxonomy & licenses

224Z00000X Occupational Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 95-027 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
40678300	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 Joanne Haag?

Joanne Haag is registered in NPPES with the primary taxonomy of Occupational Therapy Assistant. 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 2013-02-21.