Final answer:
The sequencing of codes in coding DM due to drug or chemical poisoning depends on the circumstances of the poisoning.
Step-by-step explanation:
In coding, if the patient has a drug or chemical poisoning, the primary code to sequence would depend on the circumstances of the poisoning. If the poisoning is the main reason for the encounter, then the poisoning code should be sequenced first. However, if the poisoning is leading to a specific disease or condition, then the disease or condition (DM code) should be sequenced first.
For example, if a patient has a drug overdose and it leads to acute kidney injury, the acute kidney injury code (DM code) should be sequenced first, since it is the primary reason for the encounter. The drug overdose (poisoning) code would then be sequenced second.
It is important to review the official coding guidelines and documentation from the coding classification system being used to determine the sequencing rules for specific cases.