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

Ms. Diann Kay Onsted, LCSW-C

Psychoanalyst in Potomac, MD · enumerated 2007.

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

National Provider Identifier

1205041548

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Registry record

Entity type Individual (Type 1)

Name Ms. Diann Kay Onsted

Credential LCSW-C

Sex Female

Practice address Potomac, MD, 20854

Phone (301) 452-8787

Fax (301) 299-2216

Enumeration date May 11, 2007

Last updated in NPPES Jul 9, 2007

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

Taxonomy & licenses

102L00000X Psychoanalyst Behavioral Health & Social Service Providers · License 11310 (MD) Primary

102L00000X Psychoanalyst Behavioral Health & Social Service Providers · License LC50077735 (DC) Secondary

Other identifiers

Identifier	Type	State	Issuer
K513-0001	Other	DC	BLUECROSS-DC
645-60501	Other	MD	BLUECROSS PIN-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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Diann Onsted?

Diann Onsted is registered in NPPES with the primary taxonomy of Psychoanalyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.