DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

E10 Type 1 diabetes mellitus

  • Header · not billable
  • Some codes take a 7th character

E10 is not billable. The category heads 87 billable codes in FY2027, grouped under 9 subdivisions.

ICD-10 code by name

What is the ICD-10 code for type 1 diabetes?
Type 1 diabetes ICD-10 code: E10.9 Type 1 diabetes mellitus without complications. Alphabetic Index: Diabetes, diabetic (mellitus) (sugar)type 1 → E10.9. Search ICD-10 for type 1 diabetes

Where it sits

  1. Chapter 4 Endocrine, nutritional and metabolic diseases (E00-E89)
  2. E08-E13 Diabetes mellitus (E08-E13)
  3. E10 Type 1 diabetes mellitus
Billable codes
87
Subdivisions
9
CC / MCC codes
1 / 3
HCC V28 codes
84
New FY2027
0
Index entries
73

Codes in E10

  1. E10.1
    Type 1 diabetes mellitus with ketoacidosis
    Header
  2. E10.10
    Type 1 diabetes mellitus with ketoacidosis without coma
    BillableMCC36
  3. E10.11
    Type 1 diabetes mellitus with ketoacidosis with coma
    BillableMCC36
  4. E10.2
    Type 1 diabetes mellitus with kidney complications
    Header
  5. E10.21
    Type 1 diabetes mellitus with diabetic nephropathy
    Billable37
    Inclusion terms 3

    Inclusion terms

    • Type 1 diabetes mellitus with intercapillary glomerulosclerosis
    • Type 1 diabetes mellitus with intracapillary glomerulonephrosis
    • Type 1 diabetes mellitus with Kimmelstiel-Wilson disease
  6. E10.22
    Type 1 diabetes mellitus with diabetic chronic kidney disease
    Billable37
    Use additional code 1

    Use additional code

    • code to identify stage of chronic kidney disease (N18.1-N18.6) N18.1 N18.6
  7. E10.29
    Type 1 diabetes mellitus with other diabetic kidney complication
    Billable37
    Inclusion terms 1

    Inclusion terms

    • Type 1 diabetes mellitus with renal tubular degeneration
  8. E10.3
    Type 1 diabetes mellitus with ophthalmic complications
    Header
  9. E10.31
    Type 1 diabetes mellitus with unspecified diabetic retinopathy
    Header
  10. E10.311
    Type 1 diabetes mellitus with unspecified diabetic retinopathy with macular edema
    Billable37 298
  11. E10.319
    Type 1 diabetes mellitus with unspecified diabetic retinopathy without macular edema
    Billable37
  12. E10.32
    Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy
    Header
    Inclusion terms 1

    Inclusion terms

    • Type 1 diabetes mellitus with nonproliferative diabetic retinopathy NOS
  13. E10.321
    Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  14. E10.329
    Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy without macular edema +7th: 1 2 3 9
    Needs 7th character37 (all 7th characters)
  15. E10.33
    Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy
    Header
  16. E10.331
    Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  17. E10.339
    Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema +7th: 1 2 3 9
    Needs 7th character37 (all 7th characters)
  18. E10.34
    Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy
    Header
  19. E10.341
    Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy with macular edema +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  20. E10.349
    Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy without macular edema +7th: 1 2 3 9
    Needs 7th character37 (all 7th characters)
  21. E10.35
    Type 1 diabetes mellitus with proliferative diabetic retinopathy
    Header
  22. E10.351
    Type 1 diabetes mellitus with proliferative diabetic retinopathy with macular edema +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  23. E10.352
    Type 1 diabetes mellitus with proliferative diabetic retinopathy with traction retinal detachment involving the macula +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  24. E10.353
    Type 1 diabetes mellitus with proliferative diabetic retinopathy with traction retinal detachment not involving the macula +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  25. E10.354
    Type 1 diabetes mellitus with proliferative diabetic retinopathy with combined traction retinal detachment and rhegmatogenous retinal detachment +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  26. E10.355
    Type 1 diabetes mellitus with stable proliferative diabetic retinopathy +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  27. E10.359
    Type 1 diabetes mellitus with proliferative diabetic retinopathy without macular edema +7th: 1 2 3 9
    Needs 7th character37 298 (all 7th characters)
  28. E10.36
    Type 1 diabetes mellitus with diabetic cataract
    Billable37
  29. E10.37
    Type 1 diabetes mellitus with diabetic macular edema, resolved following treatment +7th: 1 2 3 9
    Needs 7th character37 (all 7th characters)
  30. E10.39
    Type 1 diabetes mellitus with other diabetic ophthalmic complication
    Billable37
    Use additional code 2

    Use additional code

    • code to identify manifestation, such as:
    • diabetic glaucoma (H40-H42) H40 H42
  31. E10.4
    Type 1 diabetes mellitus with neurological complications
    Header
  32. E10.40
    Type 1 diabetes mellitus with diabetic neuropathy, unspecified
    Billable37
  33. E10.41
    Type 1 diabetes mellitus with diabetic mononeuropathy
    Billable37
  34. E10.42
    Type 1 diabetes mellitus with diabetic polyneuropathy
    Billable37
    Inclusion terms 1

    Inclusion terms

    • Type 1 diabetes mellitus with diabetic neuralgia
  35. E10.43
    Type 1 diabetes mellitus with diabetic autonomic (poly)neuropathy
    Billable37
    Inclusion terms 1

    Inclusion terms

    • Type 1 diabetes mellitus with diabetic gastroparesis
  36. E10.44
    Type 1 diabetes mellitus with diabetic amyotrophy
    Billable37
  37. E10.49
    Type 1 diabetes mellitus with other diabetic neurological complication
    Billable37
  38. E10.5
    Type 1 diabetes mellitus with circulatory complications
    Header
  39. E10.51
    Type 1 diabetes mellitus with diabetic peripheral angiopathy without gangrene
    Billable37
  40. E10.52
    Type 1 diabetes mellitus with diabetic peripheral angiopathy with gangrene
    BillableCC37 263
    Inclusion terms 1

    Inclusion terms

    • Type 1 diabetes mellitus with diabetic gangrene
  41. E10.59
    Type 1 diabetes mellitus with other circulatory complications
    Billable37
  42. E10.6
    Type 1 diabetes mellitus with other specified complications
    Header
  43. E10.61
    Type 1 diabetes mellitus with diabetic arthropathy
    Header
  44. E10.610
    Type 1 diabetes mellitus with diabetic neuropathic arthropathy
    Billable37
    Inclusion terms 1

    Inclusion terms

    • Type 1 diabetes mellitus with Charcôt's joints
  45. E10.618
    Type 1 diabetes mellitus with other diabetic arthropathy
    Billable37
  46. E10.62
    Type 1 diabetes mellitus with skin complications
    Header
  47. E10.620
    Type 1 diabetes mellitus with diabetic dermatitis
    Billable37
    Inclusion terms 1

    Inclusion terms

    • Type 1 diabetes mellitus with diabetic necrobiosis lipoidica
  48. E10.621
    Type 1 diabetes mellitus with foot ulcer
    Billable37 383
    Use additional code 1

    Use additional code

    • code to identify site of ulcer (L97.4-, L97.5-) L97.4 L97.5
  49. E10.622
    Type 1 diabetes mellitus with other skin ulcer
    Billable37 383
    Use additional code 1

    Use additional code

  50. E10.628
    Type 1 diabetes mellitus with other skin complications
    Billable37
  51. E10.63
    Type 1 diabetes mellitus with oral complications
    Header
  52. E10.630
    Type 1 diabetes mellitus with periodontal disease
    Billable37
  53. E10.638
    Type 1 diabetes mellitus with other oral complications
    Billable37
  54. E10.64
    Type 1 diabetes mellitus with hypoglycemia
    Header
    Use additional code 1

    Use additional code

    • code for hypoglycemia level, if applicable (E16.A-) E16.A
  55. E10.641
    Type 1 diabetes mellitus with hypoglycemia with coma
    BillableMCC36
  56. E10.649
    Type 1 diabetes mellitus with hypoglycemia without coma
    Billable38
  57. E10.65
    Type 1 diabetes mellitus with hyperglycemia
    Billable38
  58. E10.69
    Type 1 diabetes mellitus with other specified complication
    Billable37
    Use additional code 1

    Use additional code

    • code to identify complication
  59. E10.8
    Type 1 diabetes mellitus with unspecified complications
    Billable38
  60. E10.9
    Type 1 diabetes mellitus without complications
    Billable38
  61. E10.A
    Type 1 diabetes mellitus, presymptomatic
    Header
    Inclusion terms 1

    Inclusion terms

    • Early-stage type 1 diabetes mellitus
  62. E10.A0
    Type 1 diabetes mellitus, presymptomatic, unspecified
    Billable
  63. E10.A1
    Type 1 diabetes mellitus, presymptomatic, Stage 1
    Billable
    Inclusion terms 1

    Inclusion terms

    • Multiple confirmed islet autoantibodies with normoglycemia
  64. E10.A2
    Type 1 diabetes mellitus, presymptomatic, Stage 2
    Billable
    Inclusion terms 1

    Inclusion terms

    • Confirmed islet autoimmunity with dysglycemia

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At E10

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

  • diabetes mellitus due to underlying condition (E08.-) E08
  • drug or chemical induced diabetes mellitus (E09.-) E09
  • gestational diabetes (O24.4-) O24.4
  • hyperglycemia NOS (R73.9) R73.9
  • neonatal diabetes mellitus (P70.2) P70.2
  • postpancreatectomy diabetes mellitus (E13.-) E13
  • postprocedural diabetes mellitus (E13.-) E13
  • secondary diabetes mellitus NEC (E13.-) E13
  • type 2 diabetes mellitus (E11.-) E11

Notes that also apply

Chapter 4 instructions (Notes 1, Excludes1 1): printed on the chapter 4 page.

7th characters

7th characters for E10.32 defined at E10.32

One of the following 7th characters is to be assigned to codes in subcategory E10.32 to designate laterality of the disease:

7th characters for E10.32
7thMeaning (NCHS)
1right eye
2left eye
3bilateral
9unspecified eye

7th characters for E10.33 defined at E10.33

One of the following 7th characters is to be assigned to codes in subcategory E10.33 to designate laterality of the disease:

7th characters for E10.33
7thMeaning (NCHS)
1right eye
2left eye
3bilateral
9unspecified eye

7th characters for E10.34 defined at E10.34

One of the following 7th characters is to be assigned to codes in subcategory E10.34 to designate laterality of the disease:

7th characters for E10.34
7thMeaning (NCHS)
1right eye
2left eye
3bilateral
9unspecified eye

7th characters for E10.35 defined at E10.35

One of the following 7th characters is to be assigned to codes in subcategory E10.35 to designate laterality of the disease:

7th characters for E10.35
7thMeaning (NCHS)
1right eye
2left eye
3bilateral
9unspecified eye

7th characters for E10.37 defined at E10.37

One of the following 7th characters is to be assigned to code E10.37 to designate laterality of the disease:

7th characters for E10.37
7thMeaning (NCHS)
1right eye
2left eye
3bilateral
9unspecified eye

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Index entries

  • Autoantibodies, multiple confirmed islet, with normoglycemia → E10.A1
  • Autoimmunity, confirmed islet, with dysglycemia → E10.A2
  • Acetonemiain Type 1 diabetes → E10.10
  • Acidosis (lactic)in Type 1 diabetes → E10.10
  • Diabetes, diabetic (mellitus) (sugar)type 1 → E10.9
  • Acetonemiain Type 1 diabeteswith coma → E10.11
  • Acidosis (lactic)in Type 1 diabeteswith coma → E10.11
  • Diabetes, diabetic (mellitus) (sugar)type 1early-stage → E10.A-
  • Diabetes, diabetic (mellitus) (sugar)type 1presymptomatic → E10.A0
  • Diabetes, diabetic (mellitus) (sugar)type 1withketoacidosis → E10.10
  • Diabetes, diabetic (mellitus) (sugar)type 1withglomerulonephrosis, intracapillary → E10.21
  • Diabetes, diabetic (mellitus) (sugar)type 1withglomerulosclerosis, intercapillary → E10.21
  • Diabetes, diabetic (mellitus) (sugar)type 1withKimmelstiel-Wilson disease → E10.21
  • Diabetes, diabetic (mellitus) (sugar)type 1withnephropathy → E10.21
  • Diabetes, diabetic (mellitus) (sugar)type 1withchronic kidney disease → E10.22
  • Diabetes, diabetic (mellitus) (sugar)type 1withkidney complications NEC → E10.29
  • Diabetes, diabetic (mellitus) (sugar)type 1withrenal complication NEC → E10.29
  • Diabetes, diabetic (mellitus) (sugar)type 1withrenal tubular degeneration → E10.29
  • Diabetes, diabetic (mellitus) (sugar)type 1withretinopathy → E10.319
  • Diabetes, diabetic (mellitus) (sugar)type 1withcataract → E10.36
  • Diabetes, diabetic (mellitus) (sugar)type 1withophthalmic complication NEC → E10.39
  • Diabetes, diabetic (mellitus) (sugar)type 1withretinal, hemorrhage → E10.39
  • Diabetes, diabetic (mellitus) (sugar)type 1withneuropathy → E10.40
  • Diabetes, diabetic (mellitus) (sugar)type 1withmononeuropathy → E10.41
  • Diabetes, diabetic (mellitus) (sugar)type 1withneuralgia → E10.42
  • Diabetes, diabetic (mellitus) (sugar)type 1withpolyneuropathy → E10.42
  • Diabetes, diabetic (mellitus) (sugar)type 1withautonomic (poly)neuropathy → E10.43
  • Diabetes, diabetic (mellitus) (sugar)type 1withgastroparalysis → E10.43
  • Diabetes, diabetic (mellitus) (sugar)type 1withgastroparesis → E10.43
  • Diabetes, diabetic (mellitus) (sugar)type 1withamyotrophy → E10.44
  • Diabetes, diabetic (mellitus) (sugar)type 1withmyasthenia → E10.44
  • Diabetes, diabetic (mellitus) (sugar)type 1withneurologic complication NEC → E10.49
  • Diabetes, diabetic (mellitus) (sugar)type 1withperipheral angiopathy → E10.51
  • Diabetes, diabetic (mellitus) (sugar)type 1withgangrene → E10.52
  • Diabetes, diabetic (mellitus) (sugar)type 1withcirculatory complication NEC → E10.59
  • Diabetes, diabetic (mellitus) (sugar)type 1withCharcot's joints → E10.610
  • Diabetes, diabetic (mellitus) (sugar)type 1withneuropathic arthropathy → E10.610
  • Diabetes, diabetic (mellitus) (sugar)type 1witharthropathy NEC → E10.618
  • Diabetes, diabetic (mellitus) (sugar)type 1withdermatitis → E10.620
  • Diabetes, diabetic (mellitus) (sugar)type 1withnecrobiosis lipoidica → E10.620

33 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy