ICD-10 Code for type 2 diabetes
The ICD-10-CM code for type 2 diabetes is E11.9 when documented without further specification. HCC RxHCC Type 2 diabetes mellitus codes live in category E11. Code selection is driven by documented complications: E11.9 applies only when the record states type 2 diabetes without any complication.
E11.9 is a risk-adjusting diagnosis under CMS-HCC and RxHCC models. Create a free account to see model versions, RAF contribution, and AI-powered HCC suppression analysis.
Which Code Should You Use?
What to Document
- Diabetes type (type 1 vs type 2 vs drug-induced); type 2 is the default only when documentation supports it.
- Each complication and its causal link ("diabetic" or "due to diabetes").
- Insulin or oral hypoglycemic use (Z79.4 / Z79.84 may apply).
Instructional Notes for E11.9
Also Known As
Official ICD-10-CM Alphabetic Index terms that point to E11.9:
- Diabetes, diabetic (mellitus) (sugar)
- Diabetes, diabetic (mellitus) (sugar) › type 2
Coding Notes
"Diabetes mellitus" without further specification defaults to E11.9 per the Alphabetic Index. Combination codes capture the complication - do not add a separate neuropathy or nephropathy code when a combination code exists, but DO add the CKD stage with E11.22.
Prevalence & Statistics
- More than 40 million Americans (about 1 in 8) have diabetes, and about 90% to 95% of them have type 2 diabetes, according to the CDC. (CDC — Type 2 Diabetes (About Diabetes), 2023)
Related HCPCS Level II Codes
Supplies, devices, and drugs commonly associated with E11.9: