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

Mary Shannon Sumner

Individual provider Counselor · NPI 1538553300

Mary Shannon Sumner is a Mental Health Counselor in Prosser, Washington. Qualified in 2014, 12 years ago. Practices with Port Gamble S'Klallam Tribe, a 13-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
12
Licensed in
WA
In the registry since
2015

Practice location Address checks out

820 Memorial St Ste 1
Prosser, WA 99350-2504
Phone: (509) 786-2010
Fax: (509) 788-1794
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Counselor (primary) Taxonomy 101Y00000X · Licence LH60802996 (WA)

Record details

NPI number1538553300
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedMarch 19, 2015
Last updated in NPPESDecember 14, 2017
Mailing address820 Memorial St Ste 1, Prosser, WA 99350-2504

Medicare enrollment

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

Medicare specialtyMENTAL HEALTH COUNSELOR
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Port Gamble S'Klallam Tribe — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount