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

Justine Welch Mastin, LMFT, LADC

Marriage & Family Therapist in Minneapolis, MN · enumerated 2016 · practices at Travectia Thearpy & Consulting, LLC.

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

National Provider Identifier

1023564093

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Registry record

Entity type Individual (Type 1)
Name Justine Welch Mastin
Credential LMFT, LADC
Sex Female
Practice address Minneapolis, MN, 55423
Phone (612) 324-0198
Enumeration date Aug 30, 2016
Last updated in NPPES Jul 9, 2018

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 303216 (MN) Secondary
106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 2927 (MN) Primary
LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

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

Where does Justine Mastin practice?
The practice location on file with NPPES is in Minneapolis, MN. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Justine Mastin?
The National Provider Identifier (NPI) for Justine Mastin is 1023564093, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-09.