Legal analysis: 30 years, hospitalization medical records, hospital custody time should not be less than 30 years, loss or destruction are the responsibility of the hospital; The outpatient medical records created in the hospital shall be kept in the hospital for not less than fifteen years.

Legal basis: Article 53 of the Detailed Rules for the Implementation of the Regulations on the Administration of Medical Institutions stipulates that the storage period of outpatient medical records in medical institutions shall not be less than fifteen years; The retention period of hospital medical records shall not be less than thirty years.