UPDATE: Trinity Medical Center patients not affected by hospital operator data breach

More than four million U.S. patients should soon learn if they were victims of a cyber attack. Community Health Systems says the information was taken from its computer network earlier this year. It could affect Alabama patients.

The Franklin, Tennessee based company operates Trinity Medical Center in Birmingham, Gadsden Regional Medical Center in Gadsden, Home Care in Attalla, and Cherokee Home Health in Centre. It also has facilities in Dothan, Greenville, and Huntsville. However, a spokesperson for Trinity Medical Center says patients treated at Trinity have not had their information compromised.

The company says no medical or credit card information was taken in the April and June attack. However, it says the security system protecting patient names, Social Security numbers, dates of birth, addresses and phone numbers was bypassed. Patients who've been treated within the last five years could be affected.

In addition to Alabama, the company operates in 28 other states. It owns, operates or leases more than 200 facilities.