e14033 Background: In 2015, in our outpatient clinic, we implemented a breast cancer interdisciplinary team with the goal of identifying risk factors for chemotherapy delay. Evaluation of individual cases and care plans were made by a medical oncologist, clinical pharmacologist, psychologist, dietician and oncology nurse. Methods: 81 patients with breast cancer in neoadjuvant/adjuvant chemotherapy were prospectively evaluated from July 2018 until July 2019 for clinical risk: age, anthracyckine use, presence of symptoms grade >3, ASGPPP questionnaire for nutritional risk, psychological risk for pre existent issues or induce by treatment and IRPO questionnaire for screening, nursing evaluation for comunication, organization and understanding issues, and pharmacologist evaluation of polypharmacy and unknown drugs or routine use. Results: Of 81 patients evaluated and had finish treatment, 55 pts (67.9%) received adjuvant chemotherapy. Median age was 57.9 years (range:29-90.6y). We defined as risk factors for delay chemotherapy treatment: anthracycline-based chemotherapy (9.34 vs 2.58 d p:0.002), psychological risk (both risks combined) (8.1 vs 4.7 p:0.047), comunication, organization and understanding issues (15.25 vs 5.83 d p: 0.004), and unknown drugs that routinely uses (11 vs 5.34d p:0.012). Patients who needed extra nutritional and psychological appointment had greater delay in chemotherapy (Dietician: 9.636 vs 4.7 d P:0.01; Psyc: 9.1 vs 4.2d p:0.008). Conclusions: The chemotherapy scheme, psychological risk, difficulty in understanding and organizing, and unaware of the drugs used routinely uses were high risk factors for delayed chemotherapy and these patients should be handled more carefully.