Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Maria Johanna Ruffer

Occupational Therapist in Gladwin, MI · enumerated 2018.

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

National Provider Identifier

1104303023

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Registry record

Entity type Individual (Type 1)

Name Maria Johanna Ruffer

Sex Female

Practice address 449 Quarter St, Gladwin, MI, 48624

Phone (989) 426-3430

Enumeration date Jul 24, 2018

Last updated in NPPES Jul 24, 2018

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers 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

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.

What specialty is Maria Ruffer?

Maria Ruffer is registered in NPPES with the primary taxonomy of Occupational Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-24.