The NHS is grappling with an unprecedented backlog of patients awaiting essential diagnostic tests, raising serious concerns about the potential impact on health outcomes. Recent analysis reveals that a staggering 1.92 million individuals in England are currently on the waiting list for vital assessments, including CT and MRI scans. Disturbingly, over 400,000 of these patients are enduring waits surpassing the NHS’s six-week guideline, highlighting a crisis in timely healthcare delivery.
Rising Demand Exceeds NHS Capacity
The sharp increase in demand for diagnostic tests, which has risen by 500,000 since 2022, is placing immense pressure on NHS resources. This waiting list is now 83% higher than pre-pandemic levels and is projected to reach 2 million by March 2027 if current trends continue. Among those waiting, more than one in five are experiencing delays that compromise their health and wellbeing.
While the NHS has made strides in reducing the backlog for scheduled hospital care—currently standing at 7.1 million, down from 7.6 million in July 2025—the situation with diagnostic tests presents a stark contrast. Patients in regions with the longest wait times face particularly severe challenges, especially those requiring cancer diagnoses or treatment for heart conditions. In areas with the highest proportion of patients awaiting tests, individuals are nearly six times more likely to miss the NHS’s 28-day target for cancer diagnosis.
Experts Voice Concerns Over Patient Health
Rachel Power, Chief Executive of the Patients Association, expressed alarm over the impact of these delays on patient health. “A diagnostic test is not the end of a patient’s journey—it is the beginning. Without it, treatment cannot start, conditions deteriorate, and what might have been caught early becomes something far harder to treat,” she stated. Power emphasised that the rising median waiting times—up by more than 50% since before the pandemic—are particularly troubling and could lead to increased patient anxiety and declining health conditions.
Adding to the urgency, Marlen Suller, Managing Director of Magentus, confirmed that the NHS is struggling to meet the rising demand driven by an ageing population and a growing number of chronic health conditions. The waiting list currently includes a significant number of patients awaiting ultrasound scans (674,100), MRI scans (394,913), and CT scans (207,524). This comes despite the NHS achieving record numbers of tests, conducting 2.61 million in March alone.
Calls for Comprehensive Overhaul of Diagnostic Services
Medical professionals are increasingly frustrated by the ongoing situation. Professor Erika Denton, a radiology expert at the Norfolk and Norwich NHS Trust, highlighted the emotional toll on patients who are left in uncertainty while waiting for diagnosis. “It can be difficult to see patients waiting for a test to explain their symptoms, knowing the stress and anxiety that can create for them,” she commented. Denton underscored the importance of timely test results, which can either offer reassurance or expedite necessary treatment.
In light of these challenges, Suller called for a comprehensive reform of diagnostic services within the NHS. She advocated for better utilisation of existing resources, quicker testing processes, clearer communication for patients, and the implementation of financial incentives to drive improvements in service delivery.
While NHS England has not directly addressed the findings of this report, a spokesperson noted that the NHS achieved a historic high of 29.9 million diagnostic procedures last year and is committed to reducing waiting times through the expansion of community diagnostic centres.
Why it Matters
The growing backlog of diagnostic tests within the NHS is not just a statistic; it represents a significant threat to patient health across England. As waiting times stretch on, the risk of untreated conditions increases, leading to potentially dire consequences for individuals and the healthcare system as a whole. Addressing this crisis is imperative not only for restoring trust in the NHS but also for ensuring that patients receive the timely and effective care they deserve. The implications of inaction could echo through communities, affecting quality of life and health outcomes for years to come.
