Documenting cancer stage is the most important determinant of treatment approach and survival for cancer patients. However, oncologists do not routinely document a patient's cancer stage in the structured field in electronic health records. This quality improvement pilot study evaluated the impact of sending an email to physicians at a cancer center of a large academic hospital with individualized data on their rates of cancer stage documentation using a structured field. The investigators assessed patient-level documentation and physician-level rates of staging documentation over 15 months including a three-month pre-period, a six-month pilot phase and a six-month follow-up period. The investigators also estimated staging documentation rates separately for each physician's new versus established patients.

Inclusion Criteria:

• Attending physicians who had been at one of three sites of hospital between January - August 2018

Exclusion Criteria:

• Physicians treating cancer patients where American Joint Committee on Cancer (AJCC) staging modules were less clinically relevant
• Physicians with low clinical volume (<5 patients over 3 months)
• Physicians without any outpatient visits