E10 Type 1 diabetes mellitus

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Type 1 diabetes mellitus is E10 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
E08-E13: Diabetes mellitus (E08-E13)
Category E10
65 codes (48 billable)
FY2026 Status
Stable since FY2024
Includes
  • brittle diabetes (mellitus)
  • diabetes (mellitus) due to autoimmune process
  • diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction
  • idiopathic diabetes (mellitus)
  • juvenile onset diabetes (mellitus)
  • ketosis-prone diabetes (mellitus)
Excludes1
Not coded here. These conditions should NOT be coded together with E10.
  • diabetes mellitus due to underlying condition (E08.-)
  • drug or chemical induced diabetes mellitus (E09.-)
  • gestational diabetes (O24.4-)
  • hyperglycemia NOS (R73.9)
  • neonatal diabetes mellitus (P70.2)
  • postpancreatectomy diabetes mellitus (E13.-)
  • postprocedural diabetes mellitus (E13.-)
  • secondary diabetes mellitus NEC (E13.-)
  • type 2 diabetes mellitus (E11.-)

Official Coding Guidelines

Diabetes mellitus (TOC entry)

a. Diabetes mellitus ................................................................................................................... 39

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.4.a
Obesity (TOC entry)

b. Obesity .................................................................................................................................. 42

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.4.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

E10.1 Type 1 diabetes mellitus with ketoacidosis E10.10 Type 1 diabetes mellitus with ketoacidosis without coma E10.11 Type 1 diabetes mellitus with ketoacidosis with coma E10.2 Type 1 diabetes mellitus with kidney complications E10.21 Type 1 diabetes mellitus with diabetic nephropathy E10.22 Type 1 diabetes mellitus with diabetic chronic kidney disease E10.29 Type 1 diabetes mellitus with other diabetic kidney complication E10.3 Type 1 diabetes mellitus with ophthalmic complications E10.31 Type 1 diabetes mellitus with unspecified diabetic retinopathy E10.311 Type 1 diabetes mellitus with unspecified diabetic retinopathy with macular edema E10.319 Type 1 diabetes mellitus with unspecified diabetic retinopathy without macular edema E10.32 Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy E10.321 Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema E10.329 Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy without macular edema E10.33 Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy E10.331 Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema E10.339 Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema E10.34 Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy E10.341 Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy with macular edema E10.349 Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy without macular edema E10.35 Type 1 diabetes mellitus with proliferative diabetic retinopathy E10.351 Type 1 diabetes mellitus with proliferative diabetic retinopathy with macular edema E10.352 Type 1 diabetes mellitus with proliferative diabetic retinopathy with traction retinal detachment involving the macula E10.353 Type 1 diabetes mellitus with proliferative diabetic retinopathy with traction retinal detachment not involving the macula E10.354 Type 1 diabetes mellitus with proliferative diabetic retinopathy with combined traction retinal detachment and rhegmatogenous retinal detachment E10.355 Type 1 diabetes mellitus with stable proliferative diabetic retinopathy E10.359 Type 1 diabetes mellitus with proliferative diabetic retinopathy without macular edema E10.36 Type 1 diabetes mellitus with diabetic cataract E10.37 Type 1 diabetes mellitus with diabetic macular edema, resolved following treatment E10.39 Type 1 diabetes mellitus with other diabetic ophthalmic complication

Related Codes in E10

E10.1 Type 1 diabetes mellitus with ketoacidosis E10.10 Type 1 diabetes mellitus with ketoacidosis without coma E10.11 Type 1 diabetes mellitus with ketoacidosis with coma E10.2 Type 1 diabetes mellitus with kidney complications E10.21 Type 1 diabetes mellitus with diabetic nephropathy E10.22 Type 1 diabetes mellitus with diabetic chronic kidney disease E10.29 Type 1 diabetes mellitus with other diabetic kidney complication E10.3 Type 1 diabetes mellitus with ophthalmic complications E10.31 Type 1 diabetes mellitus with unspecified diabetic retinopathy E10.311 Type 1 diabetes mellitus with unspecified diabetic retinopathy with macular edema E10.319 Type 1 diabetes mellitus with unspecified diabetic retinopathy without macular edema E10.32 Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy E10.321 Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema E10.329 Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy without macular edema E10.33 Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy E10.331 Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema E10.339 Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema E10.34 Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy E10.341 Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy with macular edema E10.349 Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy without macular edema
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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