Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Main Street Health Associates, P.S.

Rural Health Clinic/Center in Brewster, WA · enumerated 2006 · authorized official Linda Niehaus, President.

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

National Provider Identifier

1821053208

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Main Street Health Associates, P.S.

Practice address 418 West Main Avenue, Brewster, WA, 98812

Phone (509) 689-8900

Fax (509) 689-9031

Enumeration date Apr 19, 2006

Last updated in NPPES Dec 10, 2010

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 601803678 (WA) Secondary

261QR1300X Rural Health Clinic/Center Ambulatory Health Care Facilities · License 601803678 (WA) Primary

Authorized official

Name Linda Niehaus

Title President

Phone (509) 689-8900

Other identifiers

Identifier	Type	State	Issuer
7086135	Medicaid	WA	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Main Street Health Associates, P.S.?

Main Street Health Associates, P.S. is registered in NPPES as a Rural Health Clinic/Center (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-10.