Adverse effect of thyroid hormones and substitutes, init

This code signifies a patient experiencing an unintended and undesirable reaction to thyroid hormones or their synthetic replacements during the initial phase of treatment. These adverse effects are typically a direct consequence of the medication itself, rather than an allergic reaction or poisoning.

Apply this code when a patient presents with symptoms such as palpitations, tremors, anxiety, or weight loss directly attributable to their prescribed thyroid medication (e.g., levothyroxine, liothyronine) and this is the first time they are being seen for this specific adverse event. This is appropriate for initial evaluation and management of the adverse effect.

• Always sequence this code first when it is the primary reason for the encounter.
• Concurrently code any specific symptoms or manifestations of the adverse effect (e.g., R00.2 for palpitations, R25.1 for tremor).
• Ensure documentation clearly links the adverse effect to the thyroid hormone medication and specifies it as an initial encounter.