In simple words: This code is used when a test shows that an organ or part of the body isn't working properly, but doctors don't yet know why. More tests will be needed to find out what's causing the problem.

This code encompasses abnormal findings from various functional studies, including radionuclide uptake studies, scintigraphy, and other tests that assess organ or system function.It's applied when the abnormal result doesn't lead to a more specific diagnosis. The code indicates that further investigation is needed to determine the underlying cause of the abnormality.

Example 1: A patient undergoes a renal function test that reveals an abnormally low glomerular filtration rate. Code R94 is assigned, pending further investigations to determine the underlying cause, such as chronic kidney disease or acute kidney injury., An electrocardiogram (ECG) shows abnormalities in rhythm or conduction.Code R94 is applied while awaiting additional testing (e.g., echocardiogram, cardiac catheterization) to establish a definitive diagnosis, such as arrhythmia or heart block., A patient presents with symptoms of fatigue and weakness.Pulmonary function testing reveals reduced lung volumes. Code R94 is utilized while pursuing further investigations (e.g., chest X-ray, bronchoscopy) to define the diagnosis, like COPD or interstitial lung disease.

Detailed reports of the functional studies, including the specific tests performed, results obtained, and interpretation of findings by qualified healthcare professionals.Patient's clinical presentation, history, and any relevant physical examination findings should also be documented.

** Code R94 is a placeholder code that indicates the need for further evaluation.It is not a diagnosis in itself.Once additional tests are conducted and a specific diagnosis can be established, the code should be replaced with the appropriate code for the confirmed condition.