What is the emergency room wait time at Mark Twain Medical Center?

Patients spend a median of 123 minutes (2 hours 3 minutes) in the emergency department at Mark Twain Medical Center, according to CMS. This is a median over a past 12-month reporting period, not a live figure.

Does Mark Twain Medical Center have an emergency room?

CMS records show Mark Twain Medical Center does not provide emergency services.

What is the CMS star rating for Mark Twain Medical Center?

Mark Twain Medical Center has an overall rating of 3 out of 5 stars from the Centers for Medicare and Medicaid Services.

Where is Mark Twain Medical Center located?

Mark Twain Medical Center is at 768 Mountain Ranch Rd, San Andreas, CA 95249.

What is the phone number for Mark Twain Medical Center?

The phone number for Mark Twain Medical Center is (209) 754-3521.

Mark Twain Medical Center

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(209) 754-3521

CountyCALAVERAS
Emergency CapableNo

Quality and performance

Centers for Medicare & Medicaid Services · data as of July 2026

Patients spend an average of 2 hours 3 minutes in the emergency department at Mark Twain Medical Center. That is 1 hour shorter than the California average of 3 hours 3 minutes.

CMS rating ★★★★★ 3/5

Left before seen 1%

ER volume low

Type Critical Access

Ownership Non-profit

Source: CMS Hospital General Information and Timely & Effective Care. Wait times are a median over a past 12-month reporting period, not live data. Not affiliated with CMS or with Mark Twain Medical Center. For a medical emergency, call 911.

Compare ER waits across California · How we source this data · Something wrong on this page? Tell us

Closest other hospitals

<0.1 mi Mark Twain St Joseph's Hospital San Andreas, CA 12 mi Sutter Amador Hospital Jackson, CA 2 hr 16 min ER wait 22 mi Tuolumne General Hospital Sonora, CA No ER 22 mi Sonora Regional Medical Center Sonora, CA 2 hr 51 min ER wait 22 mi Sonora Community Hospital Sonora, CA 2 hr 51 min ER wait

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Mark Twain Medical Center Address 768 Mountain Ranch Rd
San Andreas, CA 95249

The information listed on this page will help you determine if Mark Twain Medical Center is the nearest hospital to your location. Address, phone number, emergency department status, bed count and CMS quality measures for Mark Twain Medical Center are listed above.