All ICD10 Codes
Chapter 9

I00–I99: Diseases of the Circulatory System

Diseases of the Circulatory System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)
All CodesBillable Only
Internal Codes
PrevNext
  • I85.10—

    Secondary esophageal varices without bleeding

  • I85.11—

    Secondary esophageal varices with bleeding

  • I86—

    Varicose veins of other sites

  • I86.0—

    Sublingual varices

  • I86.1—

    Scrotal varices

  • I86.2—

    Pelvic varices

  • I86.3—

    Vulval varices

  • I86.4—

    Gastric varices

  • I86.8—

    Varicose veins of other specified sites

  • I87—

    Other disorders of veins

  • I87.0—

    Postthrombotic syndrome

  • I87.00—

    Postthrombotic syndrome without complications

  • I87.001—

    Postthrombotic syndrome without complications of right lower extremity

  • I87.002—

    Postthrombotic syndrome without complications of left lower extremity

  • I87.003—

    Postthrombotic syndrome without complications of bilateral lower extremity

  • I87.009—

    Postthrombotic syndrome without complications of unspecified extremity

  • I87.01—

    Postthrombotic syndrome with ulcer

  • I87.011—

    Postthrombotic syndrome with ulcer of right lower extremity

  • I87.012—

    Postthrombotic syndrome with ulcer of left lower extremity

  • I87.013—

    Postthrombotic syndrome with ulcer of bilateral lower extremity

  • I87.019—

    Postthrombotic syndrome with ulcer of unspecified lower extremity

  • I87.02—

    Postthrombotic syndrome with inflammation

  • I87.021—

    Postthrombotic syndrome with inflammation of right lower extremity

  • I87.022—

    Postthrombotic syndrome with inflammation of left lower extremity

  • I87.023—

    Postthrombotic syndrome with inflammation of bilateral lower extremity

  • I87.029—

    Postthrombotic syndrome with inflammation of unspecified lower extremity

  • I87.03—

    Postthrombotic syndrome with ulcer and inflammation

  • I87.031—

    Postthrombotic syndrome with ulcer and inflammation of right lower extremity

  • I87.032—

    Postthrombotic syndrome with ulcer and inflammation of left lower extremity

  • I87.033—

    Postthrombotic syndrome with ulcer and inflammation of bilateral lower extremity

  • I87.039—

    Postthrombotic syndrome with ulcer and inflammation of unspecified lower extremity

  • I87.09—

    Postthrombotic syndrome with other complications

  • I87.091—

    Postthrombotic syndrome with other complications of right lower extremity

  • I87.092—

    Postthrombotic syndrome with other complications of left lower extremity

  • I87.093—

    Postthrombotic syndrome with other complications of bilateral lower extremity

  • I87.099—

    Postthrombotic syndrome with other complications of unspecified lower extremity

  • I87.1—

    Compression of vein

  • I87.2—

    Venous insufficiency (chronic) (peripheral)

  • I87.3—

    Chronic venous hypertension (idiopathic)

  • I87.30—

    Chronic venous hypertension (idiopathic) without complications

  • I87.301—

    Chronic venous hypertension (idiopathic) without complications of right lower extremity

  • I87.302—

    Chronic venous hypertension (idiopathic) without complications of left lower extremity

  • I87.303—

    Chronic venous hypertension (idiopathic) without complications of bilateral lower extremity

  • I87.309—

    Chronic venous hypertension (idiopathic) without complications of unspecified lower extremity

  • I87.31—

    Chronic venous hypertension (idiopathic) with ulcer

  • I87.311—

    Chronic venous hypertension (idiopathic) with ulcer of right lower extremity

  • I87.312—

    Chronic venous hypertension (idiopathic) with ulcer of left lower extremity

  • I87.313—

    Chronic venous hypertension (idiopathic) with ulcer of bilateral lower extremity

  • I87.319—

    Chronic venous hypertension (idiopathic) with ulcer of unspecified lower extremity

  • I87.32—

    Chronic venous hypertension (idiopathic) with inflammation

PreviousPage 34 of 36Next