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

Maria-Johanna Hamelers, OTR/L

Occupational Therapist in Lynn, MA · enumerated 2017.

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

National Provider Identifier

1740704485

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Registry record

Entity type Individual (Type 1)

Name Maria-Johanna Hamelers

Credential OTR/L

Sex Female

Practice address Lynn, MA, 01902

Phone (781) 599-1866

Fax (781) 599-1866

Enumeration date Aug 2, 2017

Last updated in NPPES Jul 21, 2022

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

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 8884 (MA) 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-Johanna Hamelers?

Maria-Johanna Hamelers 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.