Convenient Care Center Sienna - ER
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24 Hour Emergency Room - Convenient Care Center in Sienna Plantation

Cypress CCC Location Photo
  • Open 24 hours
  • (281) 778-1105 tel

    (281) 778-1195 fax

  • 8780 Highway 6

    Suite B

    Missouri City, TX 77459

    Directions on Google >

  • Surface Lot

  • Now Open

    Open 24 hours

General Information

Clinic Hours:
24-hr Emergency Care, 7 days a week

For emergency care, the Convenient Care Center includes a 24-hour, seven-day-a-week, state-of-the-art Emergency Room staffed by board-certified emergency medicine physicians and emergency-trained nurses. Patients in need of higher levels of care can be transferred to another Memorial Hermann hospital. The Center is staffed by highly trained nurses and physicians affiliated with Memorial Hermann.

About Us

  • Affiliated board-certified physicians
  • Diagnosis and treatment of a wide variety of conditions
  • Digital X-ray, computed tomography (CT) and ultrasound
  • Onsite laboratory
  • Patients accepted via walk-in or ambulance
  • Online Appointment Scheduling
  • Most insurances accepted (ER co-payment applicable for ER visits)
  • Cash and all major credit cards accepted

Part of The Convenient Care Center in Sienna


Whether it’s a broken bone or chest pain, every medical emergency deserves rapid response by skilled professionals. The 24-hour emergency room at the Memorial Hermann Convenient Care Center in Sienna Plantation is prepared to handle the complete spectrum of medical emergencies, offering patients:

  • Treatment by experienced, affiliated board-certified Memorial Hermann emergency room physicians
  • Generally shorter wait times and lower costs than traditional hospital emergency rooms
  • On-site state-of-the-art diagnostic testing and imaging capabilities that may not be available in stand-alone quick-care ERs

The Convenient Care Center ER’s extraordinary levels of prompt service, personalized care and professional treatment have resulted in high levels of satisfaction among patients.

Conditions treated by the Convenient Care Center emergency room include:

  • Abdominal pain/discomfort
  • Back pain
  • Back injuries
  • Broken bones
  • Burns
  • Chest pain
  • Dehydration
  • Diabetic episodes
  • Eye infections, injury and foreign body removal
  • Fever
  • Head injuries
  • Infections
  • Insect and animal bites
  • Lacerations (simple or complex) that require stitches
  • Rashes
  • Seizures
  • Severe allergic reactions
  • Severe headaches
  • Sore throat, flu, sinus infections
  • Sprains, strains and dislocations
  • Strokes
  • Upper respiratory infections, pneumonia
  • Vomiting, diarrhea or nausea
  • Work-related injuries

Once a patient’s condition and its severity are determined, the Convenient Care Center can:

  • Treat patients efficiently at the center’s ER facility
  • Transport patients with serious, life-threatening conditions to inpatient care at nearby Memorial Hermann Sugar Land Hospital or Memorial Hermann Southwest Hospital
  • Help coordinate follow-up appointments with the Memorial Hermann Medical Group primary care

Notice of Facilities Fees

Please read our notice of facilities fees at freestanding emergency medical care facilities.

Forms of Payment

Most insurance accepted (ER co-payment applicable for emergency services). Cash and all major credit cards accepted.

Online Check-In

Three easy steps to reduce your ER wait time:

Choose an emergency room location
Select an estimated arrival time     
Arrive 15 minutes prior to your selected time and check in at the front desk
Choose an emergency room location near you.  See all locations.
After selecting an arrival time, please complete the required information to pre-register online.
Patients with more serious medical conditions may be seen ahead of you. 

If you need immediate attention, dial 911 or go to the nearest emergency room.