A breach at medical billing company MedInform has compromised the data of Cleveland Clinic patients.
The company began notifying affected patients May 24, according to a notice filed with the state of Massachusetts. It said it detected suspicious activity on its network Dec. 21 and found an unknown person had been viewing or downloading patients' information beginning Dec. 5.
The data may have included names, addresses, Social Security numbers, and medical billing and financial account information. MedInform contracts with Cleveland Clinic.