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

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