Mistreatment in childbirth is institutionalized in many healthcare settings globally, causing widespread harm. Rising concern has elicited research on its prevalence and characteristics, with limited attention to developing explanatory theory. Mistreatment, a complex systemic and behavioral phenomenon, requires social science theory to explain its persistence despite official norms that promote respectful care. Diane Vaughan's normalization of organizational deviance theory from organizational sociology emerged from studies of how things go wrong in organizations. Its multi-level framework provided an opportunity for analogical cross-case comparison to elaborate theory on mistreatment as normalized organizational deviance. To elaborate the theory, the Tanzanian public health system in the period of 2010-2015 was selected as a case. A broad Scopus search identified 4068 articles published on the health system and maternal health in Tanzania of which 122 were selected. Data was extracted using a framework based on the theory and reviews of mistreatment in healthcare. Relationships and patterns emerged through comparative analysis across concepts and system levels and then were compared with Vaughan's theory and additional organizational theories. Analysis revealed that normalized scarcity at the macro-level combined with production pressures for biomedical care and imbalanced power-dependence altered values, structures and processes in the health system. Meso-level actors struggled to achieve production goals with limited autonomy and resources, resulting in workarounds and informal rationing. Biomedical care was prioritized, and emotion work was rationed in provider interactions with women, which many women experienced as disrespect. Analogical comparison with another case of organizational deviance based on literature enabled a novel approach to elaborate theory. The emergent theory sheds light on opportunities to transform systems and routinize respectful care. Theory application in additional settings and exploration of other social theories is needed for further understanding of this complex problem.