… underuse is the lack of provision of necessary care (eg no aspirin prescribed after myocardial infarction), …
Source: Korenstein D, Falk R, Howell EA, Bishop T, Keyhani S (2012) Less is more. Overuse of healthcare services in the United States. An understudied problem. Arch Intern Med 172(2): 171-179.
Example of the term in use:
Underuse … is common and responsible for substantial suffering, disability, and loss of life worldwide. Underuse occurs at every point along the treatment continuum, from populations lacking access to health care to inadequate supply of medical resources and labour, slow or partial uptake of innovations, and patients not accessing or declining them. The extent of underuse for different interventions varies by country, and is documented in countries of high, middle, and low-income, and across different types of health-care systems, payment models, and health services.
Glasziou P, Straus S, Brownlee S et al (2017) Evidence for underuse of effective medical services around the world. The Lancet 390; 169-177. DOI: https://doi.org/10.1016/S0140-6736(16)30946-1