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  • Convenient Acute Services


    Lassen Medical Clinic’s Acute Care Walk-In Clinic is not an Emergency Room. If you have a medical Emergency, please call 911 or go to the nearest emergency room.

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Acute Care Walk-in Clinic


Have an issue that can’t wait? Lassen Medical Clinic provides same-day appointments and acute care walk-in clinic services seven days a week. See a physician, physician assistant or family nurse practitioner without the emergency room wait.

Cottonwood Locations & Hours

Regular Business Hours
Monday through Friday: 7:30 a.m. to 5:00 p.m.

Acute Care Walk-In Clinic – Closing hours may vary depending on patient volume
Monday through Friday: 7:30 a.m. to 5:00 p.m.
(Saturday and Sunday – CLOSED)

Radiology Department (X-ray)
Monday through Friday: 8:30 a.m. to 5:00 p.m.

Laboratory Department
Monday through Thursday: 7:30 a.m. to 3:55 p.m.
Fridays: 7:30 a.m. to 11:55 a.m.

Pediatric Shot Room/Immunizations
Monday through Friday: 8:30 a.m. to 4:30 p.m.
Closed for Lunch 1:00 p.m. to 2:00 p.m.

For more information, call us at 530.347.3418.

For after-hour emergencies, call the Cottonwood answering service at 855.489.3957.

Red Bluff Locations & Hours

Regular Business Hours
Monday through Friday: 8:00 a.m. to 5:00 p.m.

Acute Care Walk-In Clinic – Closing hours may vary depending on patient volume
Monday through Friday: 8:00 a.m. to 5:30 p.m.
Saturday: 8:00 a.m. to 4:00 p.m.
Sunday: 9:00 a.m. to 3:00 p.m.

Radiology Department (X-ray)
Monday through Friday: 8:00 a.m. to 5:30 p.m.

Laboratory Department
Monday through Friday: 7:00 a.m. to 4:45 p.m.

Pediatric Shot Room/Immunizations
Monday through Friday: 8:30 a.m. to 4:30 p.m.
Closed for Lunch 1:00 p.m. to 2:00 p.m.

For more information, call us at 530.527.0414.

For after-hour emergencies, call the Red Bluff answering service: 855.548.9492

An Acute Care Need

Many times non-emergency situations arise during evening or weekend hours when primary care offices are closed. Lassen Medical Clinic Acute Care Walk-In Clinic is designed to treat patients’ acute care needs when they cannot make it to their primary care provider’s office during normal business hours.

When Your Doctor Isn't Available

The Acute Care Walk-In Clinic is a convenient option for those times when you need treatment for ONE immediate minor illness or injury, and a visit to your primary care provider is not possible.

No appointment is necessary. Patients are seen in the order of arrival.

  • Allergies
  • Asthma attack (minor)
  • Bronchitis
  • Chickenpox
  • Cold, cough, and sore throat
  • Diarrhea & Nausea
  • Earache
  • Minor eye ailments
  • Minor flu and other viruses
  • Minor injuries
  • Rash
  • Sprains and strains
  • Urinary tract infection