Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Linn S Mcdonald Dc Inc

Chiropractor in Walnut, CA · enumerated 2021 · authorized official Linn Mcdonald, Owner/ Doctor.

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

National Provider Identifier

1609536812

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Registry record

Entity type Organization (Type 2)

Legal business name Linn S Mcdonald Dc Inc

Practice address 302 S Lemon Ave, Walnut, CA, 91789

Phone (909) 594-5243

Fax (909) 594-5374

Enumeration date Dec 29, 2021

Last updated in NPPES Dec 29, 2021

Taxonomy & classification

111N00000X Chiropractor Chiropractic Providers Primary

Authorized official

Name Linn Mcdonald

Title Owner/ Doctor

Phone (909) 594-5243

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

Where is Linn S Mcdonald Dc Inc located?

The practice location on file with NPPES is in Walnut, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2021-12-29. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

Linn Mcdonald Independent Medical Examiner Chiropractor · Walnut, CA NPI 1902889231 William Ramriez Chiropractor · Walnut, CA NPI 1578780128

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-29.