Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nicolaus Michael Mather, OT

Occupational Therapist in Westminster, MD · enumerated 2011.

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

National Provider Identifier

1891087946

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Registry record

Entity type Individual (Type 1)

Name Nicolaus Michael Mather

Credential OT

Sex Male

Practice address 844 Washington Rd, Suite 101, Westminster, MD, 21157

Phone (410) 876-5600

Fax (410) 876-1623

Enumeration date May 9, 2011

Last updated in NPPES May 9, 2011

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 06655 (MD) Primary

OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working. About the OT credential

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

How do I verify Nicolaus Mather's NPI record?

Cross-check NPI 1891087946 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891087946 active?

Yes, as of the latest NPPES snapshot, NPI 1891087946 is active (record last updated 2011-05-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-09.