Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arwen Maas-Despain, LMFT, QMHP

Marriage & Family Therapist in Eugene, OR · enumerated 2010 · practices at Oslc Developments, Inc. - Clinic.

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

National Provider Identifier

1750601951

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Registry record

Entity type Individual (Type 1)

Name Arwen Maas-Despain

Credential LMFT, QMHP

Sex Female

Practice address 10 Shelton Mcmurphey Blvd, Eugene, OR, 97401

Phone (541) 485-2711

Fax (888) 975-0250

Enumeration date Jun 10, 2010

Last updated in NPPES Jul 29, 2025

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License T1060 (OR) Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License T1060 (OR) Primary

LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

Other identifiers

Identifier	Type	State	Issuer
T1060	Other	OR	OBLPCT
500663775	Medicaid	OR	-

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 Arwen Maas-Despain practice?

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

What is the NPI number for Arwen Maas-Despain?

The National Provider Identifier (NPI) for Arwen Maas-Despain is 1750601951, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Angie Wharfield Clinical Social Worker · Eugene, OR NPI 1376561548 Jonathan Schwartz Clinical Social Worker · Eugene, OR NPI 1780773168 Laura Rains Clinical Social Worker · Eugene, OR NPI 1457432940 Mary Laws Counselor · Eugene, OR NPI 1982772893 Rohanna Buchanan Mental Health Counselor · Eugene, OR NPI 1811065881 Carol Warren Addiction (Substance Use Disorder) Counselor · Eugene, OR NPI 1255494126 Andrew Buck Mental Health Counselor · Eugene, OR NPI 1043418007 Leeandra Black Marriage & Family Therapist · Eugene, OR NPI 1336467265

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-29.