In ICD-10, Which Has Combination Codes That Include the Type

In ICD-10, which has combination codes that include the type of diabetes, what should you code if the type of diabetes is not documented in the medical record and the physician cannot be queried?

A) Use the ICD-9 code for diabetes instead
B) Use the code for type 1 diabetes mellitus
C) Use the code for type 2 diabetes mellitus
D) Use a code that specifies insulin use
E) Use add-on codes to show unspecified diabetes