RESUMEN
ABSTRACT Objective: To develop and validate DFConhecimento, an instrument to assess Brazilian healthcare professional providers' knowledge on sickle cell disease. Method: Study carried out in four stages: (1) instrument development; (2) content validation by an Expert Committee; (3) cultural adequacy check at pre-test; (4) instrument reliability analysis by healthcare professional providers supported by Intraclass Correlation Coefficient calculation. The data for content validation and reliability analyses were collected through the web tool eSurv and analyzed within the statistical software and environment R. Results: The instrument, consisting of 13 multiple-choice questions, showed acceptability, with an average Content Validity Index of 0.88. The reliability analysis showed moderate agreement (0.67) indicating that test-retest reproducibility is acceptable. Conclusion: The instrument DFConhecimento showed reliability and internal consistency, proving suitable for measuring Brazilian healthcare professional providers' acquisition of knowledge on sickle cell disease.