Y63.6 Underdosing and nonadministration of necessary drug, medicament or biological substance

Billable ICD-10-CM code, FY2026.

Applies from Y63 Failure in dosage during surgical and medical care

Excludes2 (not included here)

• accidental overdose of drug or wrong drug given in error (T36-T50)

Approximate ICD-9-CM (GEMs)

• E873.6 Nonadministration of necessary drug or medicinal substance (approximate)
• E873.8 Other specified failure in dosage (approximate)

Diagnosis Index entries for Y63.6

• Misadventure (s) to patient(s) during surgical or medical care › failure › in dosage › nonadministration of necessary drug or biological substance
• Misadventure (s) to patient(s) during surgical or medical care › nonadministration of necessary drug or biological substance
• Nonadministration (of) › drug or biological substance (necessary)
• Underdosing of necessary drugs, medicaments or biological substances

Nearby codes

• Y63.1 Incorrect dilution of fluid used during infusion
• Y63.2 Overdose of radiation given during therapy
• Y63.3 Inadvertent exposure of patient to radiation during medical care
• Y63.4 Failure in dosage in electroshock or insulin-shock therapy
• Y63.5 Inappropriate temperature in local application and packing
• Y63.6 Underdosing and nonadministration of necessary drug, medicament or biological substance (this code)
• Y63.8 Failure in dosage during other surgical and medical care
• Y63.9 Failure in dosage during unspecified surgical and medical care