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Sunnyside Community Hospital Association

Rural Health Clinic/Center in Prosser, WA · enumerated 2014 · authorized official Mathew Mathiesen, Cfo.

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

National Provider Identifier

1912305905

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Registry record

Entity type Organization (Type 2)
Legal business name Sunnyside Community Hospital Association
Other name <Unavail>
Practice address 355 Chardonnay Ave, Prosser, WA, 99350
Phone (509) 781-6366
Fax (509) 781-6367
Enumeration date Dec 8, 2014
Last updated in NPPES Oct 10, 2024

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary
207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Secondary
207RS0012X Sleep Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians Secondary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians Secondary
208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians Secondary
213E00000X Podiatrist Podiatric Medicine & Surgery Service Providers Secondary
213ES0103X Foot & Ankle Surgery Podiatrist Podiatric Medicine & Surgery Service Providers Secondary
261QR1300X Rural Health Clinic/Center Ambulatory Health Care Facilities Primary
261QU0200X Urgent Care Clinic/Center Ambulatory Health Care Facilities Secondary
363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers Secondary

Authorized official

Name Mathew Mathiesen
Title Cfo
Phone (509) 837-1379

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.

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Frequently asked questions

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2024-10-10. Verify at npiregistry.cms.hhs.gov.
Where is Sunnyside Community Hospital Association located?
The practice location on file with NPPES is in Prosser, WA.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-10.