Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Helen Au

Behavior Technician in Crofton, MD · enumerated 2019.

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

National Provider Identifier

1942861869

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Registry record

Entity type Individual (Type 1)

Name Ms. Helen Au

Sex Female

Practice address 1442 Thornbury Ct, Crofton, MD, 21114

Phone (410) 487-5503

Enumeration date Jun 21, 2019

Last updated in NPPES Jun 21, 2019

Taxonomy & licenses

106S00000X Behavior Technician Behavioral Health & Social 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.

Read the full guide → Validate an NPI →

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 Helen Au?

Helen Au is registered in NPPES with the primary taxonomy of Behavior Technician. 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 2019-06-21.