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
  • I80.243—

    Phlebitis and thrombophlebitis of peroneal vein, bilateral

  • I80.249—

    Phlebitis and thrombophlebitis of unspecified peroneal vein

  • I80.251—

    Phlebitis and thrombophlebitis of right calf muscular vein

  • I80.252—

    Phlebitis and thrombophlebitis of left calf muscular vein

  • I80.253—

    Phlebitis and thrombophlebitis of calf muscular vein, bilateral

  • I80.259—

    Phlebitis and thrombophlebitis of unspecified calf muscular vein

  • I80.291—

    Phlebitis and thrombophlebitis of other deep vessels of right lower extremity

  • I80.292—

    Phlebitis and thrombophlebitis of other deep vessels of left lower extremity

  • I80.293—

    Phlebitis and thrombophlebitis of other deep vessels of lower extremity, bilateral

  • I80.299—

    Phlebitis and thrombophlebitis of other deep vessels of unspecified lower extremity

  • I80.3—

    Phlebitis and thrombophlebitis of lower extremities, unspecified

  • I80.8—

    Phlebitis and thrombophlebitis of other sites

  • I80.9—

    Phlebitis and thrombophlebitis of unspecified site

  • I81—

    Portal vein thrombosis

  • I82.0—

    Budd-Chiari syndrome

  • I82.1—

    Thrombophlebitis migrans

  • I82.210—

    Acute embolism and thrombosis of superior vena cava

  • I82.211—

    Chronic embolism and thrombosis of superior vena cava

  • I82.220—

    Acute embolism and thrombosis of inferior vena cava

  • I82.221—

    Chronic embolism and thrombosis of inferior vena cava

  • I82.290—

    Acute embolism and thrombosis of other thoracic veins

  • I82.291—

    Chronic embolism and thrombosis of other thoracic veins

  • I82.3—

    Embolism and thrombosis of renal vein

  • I82.401—

    Acute embolism and thrombosis of unspecified deep veins of right lower extremity

  • I82.402—

    Acute embolism and thrombosis of unspecified deep veins of left lower extremity

  • I82.403—

    Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral

  • I82.409—

    Acute embolism and thrombosis of unspecified deep veins of unspecified lower extremity

  • I82.411—

    Acute embolism and thrombosis of right femoral vein

  • I82.412—

    Acute embolism and thrombosis of left femoral vein

  • I82.413—

    Acute embolism and thrombosis of femoral vein, bilateral

  • I82.419—

    Acute embolism and thrombosis of unspecified femoral vein

  • I82.421—

    Acute embolism and thrombosis of right iliac vein

  • I82.422—

    Acute embolism and thrombosis of left iliac vein

  • I82.423—

    Acute embolism and thrombosis of iliac vein, bilateral

  • I82.429—

    Acute embolism and thrombosis of unspecified iliac vein

  • I82.431—

    Acute embolism and thrombosis of right popliteal vein

  • I82.432—

    Acute embolism and thrombosis of left popliteal vein

  • I82.433—

    Acute embolism and thrombosis of popliteal vein, bilateral

  • I82.439—

    Acute embolism and thrombosis of unspecified popliteal vein

  • I82.441—

    Acute embolism and thrombosis of right tibial vein

  • I82.442—

    Acute embolism and thrombosis of left tibial vein

  • I82.443—

    Acute embolism and thrombosis of tibial vein, bilateral

  • I82.449—

    Acute embolism and thrombosis of unspecified tibial vein

  • I82.451—

    Acute embolism and thrombosis of right peroneal vein

  • I82.452—

    Acute embolism and thrombosis of left peroneal vein

  • I82.453—

    Acute embolism and thrombosis of peroneal vein, bilateral

  • I82.459—

    Acute embolism and thrombosis of unspecified peroneal vein

  • I82.461—

    Acute embolism and thrombosis of right calf muscular vein

  • I82.462—

    Acute embolism and thrombosis of left calf muscular vein

  • I82.463—

    Acute embolism and thrombosis of calf muscular vein, bilateral

PreviousPage 23 of 29Next