Abnormal results of thyroid function studies

This code indicates laboratory findings that deviate from the normal range for thyroid hormones (e.g., TSH, T3, T4). It signifies that a patient's thyroid gland may not be functioning correctly, either overproducing or underproducing hormones. This is a non-specific finding requiring further investigation to determine the underlying cause.

Use this code when the medical record documents abnormal thyroid function test results, but a definitive diagnosis of a specific thyroid disorder (e.g., hypothyroidism, hyperthyroidism) has not yet been established. It is appropriate for initial evaluations or when the physician is still investigating the cause of the abnormal findings. Documentation should clearly state "abnormal thyroid function studies" or list specific abnormal lab values without a confirmed diagnosis.

• Do not use this code if a definitive diagnosis of a thyroid disorder (e.g., E03.9 for unspecified hypothyroidism) is documented; code the specific condition instead.
• This code is often used as a primary diagnosis when the patient presents for evaluation of abnormal lab results, or as a secondary diagnosis when the abnormal results are incidental findings during an encounter for another condition.
• Always review the entire medical record to ensure that a more specific diagnosis has not been made before assigning this code.