Mary Sumner
NPI 1538553300 · Counselor · Prosser, WA
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Sumner is a Counselor provider in Prosser, WA (NPI 1538553300).
Provider details
- NPI number
- 1538553300
- Entity type
- Individual
- Primary specialty
- CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- LH60802996 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-03-19
- Last updated
- 2017-12-14
Frequently asked questions
- What is Mary Sumner's NPI number?
- Mary Sumner's National Provider Identifier (NPI) is 1538553300, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Sumner's specialty?
- Mary Sumner is listed in the NPPES registry with a primary specialty of Counselor (Behavioral Health & Social Service Providers).
- Where is Mary Sumner located?
- Mary Sumner's practice location on file with NPPES is 820 Memorial St Ste 1, Prosser, WA 99350-2504.
- What is Mary Sumner's phone number?
- The practice phone number listed in the NPPES registry for Mary Sumner is (509) 786-2010.
- Does Mary Sumner accept Medicare?
- Mary Sumner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Sumner's NPI active?
- Yes — Mary Sumner's NPI (1538553300) is active in the NPPES registry as of the last update on 2017-12-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.