Avoiding Duplicate Findings Through a Structured Medical History—A Cost Factor for Hospitals and Health Insurers
Repeated X-rays, duplicate lab tests, and preliminary examinations performed twice: Duplicate findings in the preoperative process usually do not arise because a repeat examination is medically necessary, but because existing medical history and test data are lost during the transition between the doctor’s office, the outpatient clinic, and the hospital ward, are incomplete, or are not available in a timely manner. For hospitals, this means double the staff and equipment time; for health insurance companies, it means duplicate billing for the same medical issue. A structured digital medical history closes precisely this information gap before it leads to unnecessary diagnostic testing.
What is a duplicate finding—and why does it occur during the preoperative process?
A duplicate test occurs when a diagnostic test is performed again even though a conclusive result for the same issue is already available. During the preoperative process—from referral by the primary care practice through the premedication clinic to the ward—the patient’s care transitions between different units multiple times. Information can be lost at each of these transitions: The previous findings are available only on paper, were not fully transferred to the medical record, or simply cannot be located at the time of the examination. The treating physician then decides, out of a duty of care, to perform the examination again—not out of carelessness, but because reliable information is lacking.
How much do unnecessary duplicate tests cost hospitals and health insurance companies?
Reliable, disaggregated cost figures specifically for duplicate diagnoses are rare in Germany and Austria—health insurance providers do not track them as a separate category, and relevant inquiries to statutory health insurers regarding exact case numbers generally go unanswered. However, the scale of the underlying process inefficiency can be put into perspective: A frequently cited McKinsey analysis estimated the total annual savings potential of digital health technologies in Germany at around 34 billion euros, which corresponds to approximately 12% of healthcare spending at the time. This is not a figure specific to duplicate test results, but it does indicate the scale of the impact of information loss and redundant work in the healthcare system.
The problem can be illustrated more concretely using X-ray diagnostics: According to BARMER, every resident in Germany undergoes, on average, 1.7 X-ray examinations per year, and the number of CT scans increased by about 40% between 2014 and 2017. The X-ray record was explicitly introduced so that doctors can determine whether a comparable image already exists—an acknowledgment that the lack of an overview of previous findings is a structural problem, not merely an anecdotal one.
What do the current guidelines on preoperative diagnostics say about routine examinations?
The joint recommendation on preoperative evaluation, updated in 2024 by the German Society of Anesthesiology and Intensive Care Medicine (DGAI), the German Society of Surgery (DGCH), and the German Society of Internal Medicine (DGIM), is clear on this point: Routine laboratory screening should not be performed. Further investigations—laboratory tests, ECG, imaging—are indicated only if the medical history and physical examination provide concrete evidence that actually influences the perioperative management. The guideline thus explicitly makes a comprehensive, structured medical history a prerequisite for being able to forgo additional diagnostics—not merely an option, but the professional basis for the decision.
| Procedure | Reasons for Diagnosis | Consequences of Duplicate Findings |
|---|---|---|
| Routine Screening Without Reference to Medical History | Standard protocol, regardless of the specific case | High Risk of Unnecessary Repeat Tests |
| Medical History-Based, Risk-Adapted Diagnostics | Specific findings from a complete medical history or physical examination | Diagnostics are performed only if they actually change the course of action |
The practical challenge lies in the fact that a “complete medical history” is only useful as a basis for decision-making if it is actually complete, structured, and accessible to all parties involved. This is precisely where the intelligent medical history differs from a digital questionnaire: A static medical history form simply documents answers, whereas an intelligent medical history checks them for completeness and plausibility before they are incorporated into daily clinical practice.
How does a structured digital medical history close the information gap?
medudoc adaptively captures the patient’s medical history and continuously checks the information for completeness. Using Medical Reasoning, the platform identifies gaps and anomalies in the recorded data and asks targeted follow-up questions—information that medical staff would collect anyway, but which is already available in a structured format before face-to-face contact with the patient. Important to note: Medical Reasoning does not make any medical decisions. It prepares information for the physician’s assessment; the decision as to whether a preliminary examination is sufficient or a new examination is necessary always remains with the physician.
Three elements in particular are relevant for avoiding duplicate findings:
- Structured recording of medications and pre-existing conditions instead of free-form text, making the data traceable and machine-readable.
- A completeness check during the medical history-taking process that identifies gaps before the patient arrives at the outpatient clinic.
- HIS integration via FHIR, so that medical history data and available test results are available where the next decision is made, rather than remaining in a separate paper file.
This integration with the existing hospital IT infrastructure is no minor matter: Without seamless interfaces between patient referral, medical history, the outpatient clinic, and the inpatient ward, even the most thorough medical history remains an isolated data set that can be lost again at the next handoff point. The connection between fragmented processes and avoidable duplication of work is also described in the article “Digital Medical History as a Blind Spot in the OR Process.”
What impact does this have on hospital management—and on payers?
From an economic perspective, the math is straightforward for management: Every duplicate test that is avoided saves staff time, equipment capacity, and—in the case of diagnostic imaging—additional radiation exposure, without providing any additional medical benefit. For health insurance companies as payers, the same principle applies at the systemic level: Every examination that is billed again without yielding new diagnostic information ties up resources that are then lacking elsewhere in the healthcare system.
There are currently no reliable internal metrics available on the reduction of duplicate findings achieved through medudoc—this would require hospital-specific before-and-after surveys, which medudoc has not yet conducted. What has been demonstrated, however, is the overall time-saving effect of a structured, digital intake process: A study by the University Hospital of Würzburg shows that video-assisted patient counseling reduces the time physicians spend on counseling by approximately 77% for cholecystectomies and approximately 68% for colon surgeries, with patient satisfaction remaining unchanged. A complete, pre-screened medical history is essential to ensure that this time is actually spent with the patient rather than searching for missing prior medical records.
What does this mean specifically for the premedication clinic?
In the premedication clinic, these two factors intersect particularly clearly: According to Schuster et al. (2004) and Salzwedel et al. (2008), the average time spent on patient education and counseling per patient is approximately 20 to 26 minutes. Part of this time is due to the fact that missing or incomplete prior medical records must be requested or obtained on-site. If the medical history is already complete and structured, the consultation can focus on the actual risk assessment rather than re-collecting basic information. The article “Preoperative Intake Process ” describes in detail how this affects the overall time allocation in the outpatient clinic. The connection between a complete medical history and time savings for high-risk patients is further explored in the article “More Time for High-Risk Patients Through Smart Medical History-Taking.”
Conclusion
Duplicate findings are rarely a medical problem—they are an information problem at the interfaces of the preoperative process. The current guideline on preoperative evaluation explicitly states that a complete medical history is a prerequisite for being able to forgo additional diagnostic tests. A structured digital medical history, complete with a completeness check and seamless integration with the hospital information system (HIS), is therefore not merely a convenience feature for patients, but a direct tool for reducing avoidable costs—for the hospital as well as for payers. medudoc’s digital preoperative workflow demonstrates how this approach is integrated into the entire preoperative process.
