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Mark Twain Medical Center

Critical Access Hospital in San Andreas, CA · enumerated 2006 · authorized official John Chivers, Chief Financial Officer.

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

National Provider Identifier

1508968819

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Registry record

Entity type Organization (Type 2)
Legal business name Mark Twain Medical Center
Practice address 768 Mountain Ranch Rd, San Andreas, CA, 95249
Phone (209) 754-3521
Fax (209) 754-2675
Enumeration date Sep 5, 2006
Last updated in NPPES Apr 15, 2021

Taxonomy & classification

282N00000X General Acute Care Hospital Hospitals · License 030000058 (CA) Secondary
282NC0060X Critical Access Hospital Hospitals Primary

Authorized official

Name John Chivers
Title Chief Financial Officer
Phone (209) 754-2614

Other identifiers

Identifier Type State Issuer
ZZR00366G Medicaid CA -
LTC30366G Medicaid CA -
ZZZC0502Z Other - BLUE SHIELD OF CA
233520100 Other - DEPT. OF LABOR - WC
HSP40366G Medicaid CA -

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

Who is the authorized official for Mark Twain Medical Center?
NPPES lists John Chivers (Chief Financial Officer) as the authorized official for this organization.
What is the NPI number for Mark Twain Medical Center?
The NPI for Mark Twain Medical Center is 1508968819, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-15.