E10.21 Type 1 diabetes mellitus with diabetic nephropathy
The ICD-10-CM code for Type 1 diabetes mellitus with diabetic nephropathy is E10.21 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- E08-E13: Diabetes mellitus (E08-E13)
- Category E10
- 65 codes (48 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to E10.21:
- Diabetes, diabetic (mellitus) (sugar) › type 1 › with › nephropathy
- Diabetes, diabetic (mellitus) (sugar) › type 1 › with › Kimmelstiel-Wilson disease
- Diabetes, diabetic (mellitus) (sugar) › type 1 › with › glomerulosclerosis, intercapillary
- Diabetes, diabetic (mellitus) (sugar) › type 1 › with › glomerulonephrosis, intracapillary
Inclusion Terms
- Type 1 diabetes mellitus with intercapillary glomerulosclerosis
- Type 1 diabetes mellitus with intracapillary glomerulonephrosis
- Type 1 diabetes mellitus with Kimmelstiel-Wilson disease
U.S. Hospital Utilization
- An estimated 7,920 U.S. inpatient stays in 2023 included E10.21 among the documented diagnoses.
- 160 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Diabetes mellitus (TOC entry)a. Diabetes mellitus ................................................................................................................... 39
Obesity (TOC entry)b. Obesity .................................................................................................................................. 42
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026