Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

MS. Diane Elizabeth Marr Longmire, MSW, LMHC

Individual provider Social Worker · NPI 1205133881

MS. Diane Elizabeth Marr Longmire, MSW, LMHC is a Mental Health Counselor in Mount Vernon, Washington. Qualified in 2004, 22 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in Washington.

Years since qualifying
22
Licensed in
WA
In the registry since
2011
Specialties on file
2
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.
LMHC — Licensed Mental Health Counselor
A licensed mental health counsellor; the title used in Florida, New York and Washington among others.

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Practice location Address checks out

811 Cleveland Ave Ste 104
Mount Vernon, WA 98273-4210
Phone: (360) 474-3072
Fax: (888) 538-7694
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence LH60266648 (WA)
Social Worker Taxonomy 104100000X · Licence CG 60122469 (WA)

Record details

NPI number1205133881
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSW , LMHC
Sole proprietorYes
NPI enumeratedFebruary 17, 2011
Last updated in NPPESMarch 21, 2023
Certification dateMarch 21, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMENTAL HEALTH COUNSELOR
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Mount Vernon