Nonspecific abnormal results of function study of basal metabolism

This code signifies an abnormal finding from a basal metabolism function study, indicating a deviation from expected metabolic rates without a definitive diagnosis. It suggests an underlying issue affecting the body's energy expenditure at rest, but the specific cause is not yet identified.

Use this code when laboratory or functional studies of basal metabolic rate (BMR) return results outside the normal range, and the physician has not yet determined the specific etiology. This often occurs during initial workups for unexplained weight changes, fatigue, or suspected thyroid dysfunction where further investigation is pending.

• Do not use if a specific diagnosis explaining the abnormal BMR (e.g., hypothyroidism, hyperthyroidism) has been established.
• Always sequence this code after any definitive diagnoses, if known, or as a primary diagnosis when the abnormal finding is the reason for the encounter.
• Ensure documentation clearly states an "abnormal" or "nonspecific" result of a basal metabolism study.