An endocrinology note documents hyperglycemia related to underdosing of insulin because the patient could not afford the medication. Which coding approach best reflects the documentation?
Select an answer to reveal the explanation.
Short Explanation
Underdosing isn’t poisoning—it’s ‘took less than prescribed,’ often with a reason. When cost barriers show up in the note beside hyperglycemia, those pieces can ride along. Capture the clinical problem and the documented why.
Full Explanation
ICD-10-CM provides underdosing codes for taking less of a medication than prescribed, distinct from poisoning or adverse effect pathways. When underdosing contributes to hyperglycemia, both the clinical condition and underdosing are coded as directed. Documented social determinants such as inability to afford medication may be reported with appropriate Z-codes as additional information. Coders should not reclassify underdosing as poisoning without supporting documentation.