Adverse effect of unsp hormone antagonists, subs encntr

This code signifies a harmful or undesirable reaction experienced by a patient due to an unspecified hormone antagonist during a follow-up visit. The adverse effect is not a result of an overdose or poisoning, but rather an expected or unexpected side effect of the medication. The specific hormone antagonist responsible for the reaction is not documented.

Apply this code when a patient presents for ongoing management of an adverse reaction to a hormone antagonist, and the specific drug causing the reaction is unknown or not specified in the medical record. This is appropriate for subsequent encounters after the initial treatment of the adverse effect. Examples include follow-up for persistent nausea, rash, or fatigue attributed to an unidentifiable hormone antagonist.

• Ensure documentation clearly states the encounter is for follow-up care of the adverse effect, not the initial treatment.
• Verify that the specific hormone antagonist is truly unspecified; if known, a more specific code from the T38 category should be used.
• Always code the specific manifestation of the adverse effect first, followed by this code as a secondary diagnosis.