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

Ms. Catherine Dykstra Alles, M.A., CCC/A, F/AAA

Audiologist in Westminster, MD · enumerated 2007.

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

National Provider Identifier

1588863682

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Registry record

Entity type Individual (Type 1)

Name Ms. Catherine Dykstra Alles

Credential M.A., CCC/A, F/AAA

Sex Female

Practice address Westminster, MD, 21157

Phone (410) 876-4449

Fax (410) 876-4905

Enumeration date Jul 17, 2007

Last updated in NPPES Apr 28, 2015

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

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 216 (MD) Primary

Other identifiers

Identifier	Type	State	Issuer
214293700	Medicaid	MD	-

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 Catherine Alles's NPI record?

Cross-check NPI 1588863682 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1588863682 active?

Yes, as of the latest NPPES snapshot, NPI 1588863682 is active (record last updated 2015-04-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-28.