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

Heather Stone Diehl, MSW, LMSW

Social Worker in Elkton, MD · enumerated 2022 · practices at Changing Tides Therapeutic & Consultative Services, LLC.

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

National Provider Identifier

1558074294

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Registry record

Entity type Individual (Type 1)
Name Heather Stone Diehl
Credential MSW, LMSW
Sex Female
Practice address Elkton, MD, 21921
Phone (410) 996-4878
Enumeration date Dec 27, 2022
Last updated in NPPES May 24, 2023

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

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 24735 (MD) Secondary
104100000X Social Worker Behavioral Health & Social Service Providers · License 24735 (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.

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Frequently asked questions

What is the NPI number for Heather Diehl?
The National Provider Identifier (NPI) for Heather Diehl is 1558074294, a Type 1 (individual) record in the CMS NPPES registry.
Where does Heather Diehl practice?
The practice location on file with NPPES is in Elkton, MD. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-24.