Hello. I am confused on the sequencing of steriod-induced diabetes mellitus due to the prolonged use of corticosteroids. Subsequent visit for the diabetes. The drug was discontinued at the previous visit.
E09.9 and T38.0X5D

The answer I am being given is sequence the T38. code first followed by the E09 code.

However, ICD 10 states under E09 Drug or Chemical induced diabetes mellitus:

Use Additional

code for adverse effect, if applicable, to identify drug (T36-T50
with fifth or sixth character 5)

Code First

poisoning due to drug or toxin, if applicable (T36
-T65
with fifth or sixth character 1-4 or 6)

The answer given seems to go against the guidelines.
Is the diabetes a manifestation of the steroid use or an adverse effect?
If it gets sequenced second- why?