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

Miss Joanna Margaret Herrington, L.C.S.W-C

Social Worker in Baltimore, MD · enumerated 2012.

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

National Provider Identifier

1023360369

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Registry record

Entity type Individual (Type 1)

Name Miss Joanna Margaret Herrington

Credential L.C.S.W-C

Sex Female

Practice address Baltimore, MD, 21224

Phone (515) 720-5580

Enumeration date Oct 10, 2012

Last updated in NPPES Oct 3, 2016

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

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 18103 (MD) 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

Where does Joanna Herrington practice?

The practice location on file with NPPES is in Baltimore, MD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Joanna Herrington?

The National Provider Identifier (NPI) for Joanna Herrington is 1023360369, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-10-03.