Underdosing of other opioids, subsequent encounter

This code signifies a patient's underdosing of an opioid medication, excluding opium, heroin, and methadone, that is being addressed during a follow-up visit. Underdosing implies the patient took less than the prescribed amount, leading to a recurrence or worsening of the condition the opioid was intended to treat.

Use this code when documenting a subsequent encounter for a patient who previously underdosed on an opioid other than opium, heroin, or methadone. This could include scenarios where the patient is experiencing ongoing pain due to insufficient opioid intake, or when the provider is monitoring the effects of the underdosing and adjusting treatment.

• Ensure the documentation clearly specifies "underdosing" and not an adverse effect or poisoning.
• Confirm the opioid involved is not opium, heroin, or methadone, as those have specific codes.
• Verify that this is a subsequent encounter for the underdosing event, not the initial presentation.