I.C.4.a
Diabetes mellitus
The diabetes mellitus codes are combination codes that include the type of diabetes mellitus, the body system affected, and the complications affecting that body system. As many codes within a particular category as are necessary to describe all of the complications of the disease may be used. They should be sequenced based on the reason for a particular encounter.
Assign as many codes from categories E08 – E13 as needed to identify all of the associated conditions that the patient has.
In this section
- I.C.4.a.1)Type of diabetes
- I.C.4.a.2)Type of diabetes mellitus not documented
- I.C.4.a.3)Diabetes mellitus and the use of insulin, oral hypoglycemics, and injectable non-insulin drugs
- I.C.4.a.4)Diabetes mellitus in pregnancy and gestational diabetes
- I.C.4.a.5)Complications due to insulin pump malfunction
- I.C.4.a.6)Secondary diabetes mellitus
ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026 (effective October 1, 2025). Published by CMS and NCHS. Reproduced for reference — always verify against the official CMS release.