Other venous embolism and thrombosis I82-

Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • venous embolism and thrombosis complicating:
  • abortion, ectopic or molar pregnancy (
    ICD-10-CM Diagnosis Code O00

    Ectopic pregnancy

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Includes
    • ruptured ectopic pregnancy
    Use Additional
    • code from category O08 to identify any associated complication
    O00
    -
    ICD-10-CM Diagnosis Code O07

    Failed attempted termination of pregnancy

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Includes
    • failure of attempted induction of termination of pregnancy
    • incomplete elective abortion
    Type 1 Excludes
    • incomplete spontaneous abortion (O03.0-)
    O07
    ,
    ICD-10-CM Diagnosis Code O08.7

    Other venous complications following an ectopic and molar pregnancy

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Maternity Dx (12-55 years) Female Dx
    O08.7
    )
  • pregnancy, childbirth and the puerperium (
    ICD-10-CM Diagnosis Code O22
    • O22 Venous complications and hemorrhoids in pregn...
      • O22.0 Varicose veins of lower extremity in pregnanc...
        • O22.00 Varicose veins of lower extremity in pregnanc...
        • O22.01 Varicose veins of lower extremity in pregnanc...
        • O22.02 Varicose veins of lower extremity in pregnanc...
        • O22.03 Varicose veins of lower extremity in pregnanc...
      • O22.1 Genital varices in pregnancy
        • O22.10 Genital varices in pregnancy, unspecified tri...
        • O22.11 Genital varices in pregnancy, first trimester...
        • O22.12 Genital varices in pregnancy, second trimeste...
        • O22.13 Genital varices in pregnancy, third trimester...
      • O22.2 Superficial thrombophlebitis in pregnancy
        • O22.20 Superficial thrombophlebitis in pregnancy, un...
        • O22.21 Superficial thrombophlebitis in pregnancy, fi...
        • O22.22 Superficial thrombophlebitis in pregnancy, se...
        • O22.23 Superficial thrombophlebitis in pregnancy, th...
      • O22.3 Deep phlebothrombosis in pregnancy
        • O22.30 Deep phlebothrombosis in pregnancy, unspecifi...
        • O22.31 Deep phlebothrombosis in pregnancy, first tri...
        • O22.32 Deep phlebothrombosis in pregnancy, second tr...
        • O22.33 Deep phlebothrombosis in pregnancy, third tri...
      • O22.4 Hemorrhoids in pregnancy
        • O22.40 Hemorrhoids in pregnancy, unspecified trimest...
        • O22.41 …… first trimester
        • O22.42 …… second trimester
        • O22.43 …… third trimester
      • O22.5 Cerebral venous thrombosis in pregnancy
        • O22.50 Cerebral venous thrombosis in pregnancy, unsp...
        • O22.51 Cerebral venous thrombosis in pregnancy, firs...
        • O22.52 Cerebral venous thrombosis in pregnancy, seco...
        • O22.53 Cerebral venous thrombosis in pregnancy, thir...
      • O22.8 Other venous complications in pregnancy
        • O22.8X Other venous complications in pregnancy
          • O22.8X1 Other venous complications in pregnancy, firs...
          • O22.8X2 Other venous complications in pregnancy, seco...
          • O22.8X3 Other venous complications in pregnancy, thir...
          • O22.8X9 Other venous complications in pregnancy, unsp...
      • O22.9 Venous complication in pregnancy, unspecified...
        • O22.90 Venous complication in pregnancy, unspecified...
        • O22.91 Venous complication in pregnancy, unspecified...
        • O22.92 Venous complication in pregnancy, unspecified...
        • O22.93 Venous complication in pregnancy, unspecified...
    O22.-
    ,
    ICD-10-CM Diagnosis Code O87
    • O87 Venous complications and hemorrhoids in the p...
      • O87.0 Superficial thrombophlebitis in the puerperiu...
      • O87.1 Deep phlebothrombosis in the puerperium
      • O87.2 Hemorrhoids in the puerperium
      • O87.3 Cerebral venous thrombosis in the puerperium
      • O87.4 Varicose veins of lower extremity in the puer...
      • O87.8 Other venous complications in the puerperium
      • O87.9 Venous complication in the puerperium, unspec...
    O87.-
    )
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (I82) and the excluded code together.
  • venous embolism and thrombosis (of):
  • cerebral (
    ICD-10-CM Diagnosis Code I63.6

    Cerebral infarction due to cerebral venous thrombosis, nonpyogenic

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    I63.6
    ,
    ICD-10-CM Diagnosis Code I67.6

    Nonpyogenic thrombosis of intracranial venous system

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Nonpyogenic thrombosis of cerebral vein
    • Nonpyogenic thrombosis of intracranial venous sinus
    Type 1 Excludes
    • nonpyogenic thrombosis of intracranial venous system causing infarction (I63.6)
    I67.6
    )
  • coronary (
    ICD-10-CM Diagnosis Code I21

    Acute myocardial infarction

      2016 2017 2018 - Revised Code 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Includes
    • cardiac infarction
    • coronary (artery) embolism
    • coronary (artery) occlusion
    • coronary (artery) rupture
    • coronary (artery) thrombosis
    • infarction of heart, myocardium, or ventricle
    • myocardial infarction specified as acute or with a stated duration of 4 weeks (28 days) or less from onset
    Type 2 Excludes
    • old myocardial infarction (I25.2)
    • postmyocardial infarction syndrome (I24.1)
    • subsequent type 1 myocardial infarction (I22.-)
    Use Additional
    • code, if applicable, to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    I21
    -
    ICD-10-CM Diagnosis Code I25

    Chronic ischemic heart disease

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • non-ischemic myocardial injury (I5A)
    Use Additional
    • code to identify:
    • chronic total occlusion of coronary artery (I25.82)
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    I25
    )
  • intracranial and intraspinal, septic or NOS (
    ICD-10-CM Diagnosis Code G08

    Intracranial and intraspinal phlebitis and thrombophlebitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Septic embolism of intracranial or intraspinal venous sinuses and veins
    • Septic endophlebitis of intracranial or intraspinal venous sinuses and veins
    • Septic phlebitis of intracranial or intraspinal venous sinuses and veins
    • Septic thrombophlebitis of intracranial or intraspinal venous sinuses and veins
    • Septic thrombosis of intracranial or intraspinal venous sinuses and veins
    Type 1 Excludes
    • intracranial phlebitis and thrombophlebitis complicating:
    • abortion, ectopic or molar pregnancy (O00-O07, O08.7)
    • pregnancy, childbirth and the puerperium (O22.5, O87.3)
    • nonpyogenic intracranial phlebitis and thrombophlebitis (I67.6)
    Type 2 Excludes
    • intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
    G08
    )
  • intracranial, nonpyogenic (
    ICD-10-CM Diagnosis Code I67.6

    Nonpyogenic thrombosis of intracranial venous system

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Nonpyogenic thrombosis of cerebral vein
    • Nonpyogenic thrombosis of intracranial venous sinus
    Type 1 Excludes
    • nonpyogenic thrombosis of intracranial venous system causing infarction (I63.6)
    I67.6
    )
  • intraspinal, nonpyogenic (
    ICD-10-CM Diagnosis Code G95.1

    Vascular myelopathies

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • intraspinal phlebitis and thrombophlebitis, except non-pyogenic (G08)
    G95.1
    )
  • mesenteric (
    ICD-10-CM Diagnosis Code K55.0

    Acute vascular disorders of intestine

      2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Applicable To
    • Infarction of appendices epiploicae
    • Mesenteric (artery) (vein) embolism
    • Mesenteric (artery) (vein) infarction
    • Mesenteric (artery) (vein) thrombosis
    K55.0-
    )
  • portal (
    ICD-10-CM Diagnosis Code I81

    Portal vein thrombosis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Portal (vein) obstruction
    Type 2 Excludes
    • hepatic vein thrombosis (I82.0)
    • phlebitis of portal vein (K75.1)
    I81
    )
  • pulmonary (
    ICD-10-CM Diagnosis Code I26
    • I26 Pulmonary embolism
      • I26.0 Pulmonary embolism with acute cor pulmonale
        • I26.01 Septic pulmonary embolism with acute cor pulm...
        • I26.02 Saddle embolus of pulmonary artery with acute...
        • I26.09 Other pulmonary embolism with acute cor pulmo...
      • I26.9 Pulmonary embolism without acute cor pulmonal...
        • I26.90 Septic pulmonary embolism without acute cor p...
        • I26.92 Saddle embolus of pulmonary artery without ac...
        • I26.93 Single subsegmental pulmonary embolism withou...
        • I26.94 Multiple subsegmental pulmonary emboli withou...
        • I26.99 Other pulmonary embolism without acute cor pu...
    I26.-
    )
Codes
  • I82 Other venous embolism and thrombosis
    • I82.0 Budd-Chiari syndrome
    • I82.1 Thrombophlebitis migrans
    • I82.2 Embolism and thrombosis of vena cava and other thoracic veins
      • I82.21 Embolism and thrombosis of superior vena cava
        • I82.210 Acute embolism and thrombosis of superior vena cava
        • I82.211 Chronic embolism and thrombosis of superior vena cava
      • I82.22 Embolism and thrombosis of inferior vena cava
        • I82.220 Acute embolism and thrombosis of inferior vena cava
        • I82.221 Chronic embolism and thrombosis of inferior vena cava
      • I82.29 Embolism and thrombosis of other thoracic veins
        • 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
    • I82.4 Acute embolism and thrombosis of deep veins of lower extremity
      • I82.40 Acute embolism and thrombosis of unspecified deep veins of lower extremity
        • 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 …… bilateral
        • I82.409 Acute embolism and thrombosis of unspecified deep veins of unspecified lower extremity
      • I82.41 Acute embolism and thrombosis of femoral vein
        • I82.411 Acute embolism and thrombosis of right femoral vein
        • I82.412 Acute embolism and thrombosis of left femoral vein
        • I82.413 …… bilateral
        • I82.419 Acute embolism and thrombosis of unspecified femoral vein
      • I82.42 Acute embolism and thrombosis of iliac vein
        • I82.421 Acute embolism and thrombosis of right iliac vein
        • I82.422 Acute embolism and thrombosis of left iliac vein
        • I82.423 …… bilateral
        • I82.429 Acute embolism and thrombosis of unspecified iliac vein
      • I82.43 Acute embolism and thrombosis of popliteal vein
        • I82.431 Acute embolism and thrombosis of right popliteal vein
        • I82.432 Acute embolism and thrombosis of left popliteal vein
        • I82.433 …… bilateral
        • I82.439 Acute embolism and thrombosis of unspecified popliteal vein
      • I82.44 Acute embolism and thrombosis of tibial vein
        • I82.441 Acute embolism and thrombosis of right tibial vein
        • I82.442 Acute embolism and thrombosis of left tibial vein
        • I82.443 …… bilateral
        • I82.449 Acute embolism and thrombosis of unspecified tibial vein
      • I82.45 Acute embolism and thrombosis of peroneal vein
        • I82.451 Acute embolism and thrombosis of right peroneal vein
        • I82.452 Acute embolism and thrombosis of left peroneal vein
        • I82.453 …… bilateral
        • I82.459 Acute embolism and thrombosis of unspecified peroneal vein
      • I82.46 Acute embolism and thrombosis of calf muscular 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 …… bilateral
        • I82.469 Acute embolism and thrombosis of unspecified calf muscular vein
      • I82.49 Acute embolism and thrombosis of other specified deep vein of lower extremity
        • I82.491 Acute embolism and thrombosis of other specified deep vein of right lower extremity
        • I82.492 Acute embolism and thrombosis of other specified deep vein of left lower extremity
        • I82.493 …… bilateral
        • I82.499 Acute embolism and thrombosis of other specified deep vein of unspecified lower extremity
      • I82.4Y Acute embolism and thrombosis of unspecified deep veins of proximal lower extremity
        • I82.4Y1 Acute embolism and thrombosis of unspecified deep veins of right proximal lower extremity
        • I82.4Y2 Acute embolism and thrombosis of unspecified deep veins of left proximal lower extremity
        • I82.4Y3 …… bilateral
        • I82.4Y9 Acute embolism and thrombosis of unspecified deep veins of unspecified proximal lower extremity
      • I82.4Z Acute embolism and thrombosis of unspecified deep veins of distal lower extremity
        • I82.4Z1 Acute embolism and thrombosis of unspecified deep veins of right distal lower extremity
        • I82.4Z2 Acute embolism and thrombosis of unspecified deep veins of left distal lower extremity
        • I82.4Z3 …… bilateral
        • I82.4Z9 Acute embolism and thrombosis of unspecified deep veins of unspecified distal lower extremity
    • I82.5 Chronic embolism and thrombosis of deep veins of lower extremity
      • I82.50 Chronic embolism and thrombosis of unspecified deep veins of lower extremity
        • I82.501 Chronic embolism and thrombosis of unspecified deep veins of right lower extremity
        • I82.502 Chronic embolism and thrombosis of unspecified deep veins of left lower extremity
        • I82.503 …… bilateral
        • I82.509 Chronic embolism and thrombosis of unspecified deep veins of unspecified lower extremity
      • I82.51 Chronic embolism and thrombosis of femoral vein
        • I82.511 Chronic embolism and thrombosis of right femoral vein
        • I82.512 Chronic embolism and thrombosis of left femoral vein
        • I82.513 …… bilateral
        • I82.519 Chronic embolism and thrombosis of unspecified femoral vein
      • I82.52 Chronic embolism and thrombosis of iliac vein
        • I82.521 Chronic embolism and thrombosis of right iliac vein
        • I82.522 Chronic embolism and thrombosis of left iliac vein
        • I82.523 …… bilateral
        • I82.529 Chronic embolism and thrombosis of unspecified iliac vein
      • I82.53 Chronic embolism and thrombosis of popliteal vein
        • I82.531 Chronic embolism and thrombosis of right popliteal vein
        • I82.532 Chronic embolism and thrombosis of left popliteal vein
        • I82.533 …… bilateral
        • I82.539 Chronic embolism and thrombosis of unspecified popliteal vein
      • I82.54 Chronic embolism and thrombosis of tibial vein
        • I82.541 Chronic embolism and thrombosis of right tibial vein
        • I82.542 Chronic embolism and thrombosis of left tibial vein
        • I82.543 …… bilateral
        • I82.549 Chronic embolism and thrombosis of unspecified tibial vein
      • I82.55 Chronic embolism and thrombosis of peroneal vein
        • I82.551 Chronic embolism and thrombosis of right peroneal vein
        • I82.552 Chronic embolism and thrombosis of left peroneal vein
        • I82.553 …… bilateral
        • I82.559 Chronic embolism and thrombosis of unspecified peroneal vein
      • I82.56 Chronic embolism and thrombosis of calf muscular vein
        • I82.561 Chronic embolism and thrombosis of right calf muscular vein
        • I82.562 Chronic embolism and thrombosis of left calf muscular vein
        • I82.563 …… bilateral
        • I82.569 Chronic embolism and thrombosis of unspecified calf muscular vein
      • I82.59 Chronic embolism and thrombosis of other specified deep vein of lower extremity
        • I82.591 Chronic embolism and thrombosis of other specified deep vein of right lower extremity
        • I82.592 Chronic embolism and thrombosis of other specified deep vein of left lower extremity
        • I82.593 …… bilateral
        • I82.599 Chronic embolism and thrombosis of other specified deep vein of unspecified lower extremity
      • I82.5Y Chronic embolism and thrombosis of unspecified deep veins of proximal lower extremity
        • I82.5Y1 Chronic embolism and thrombosis of unspecified deep veins of right proximal lower extremity
        • I82.5Y2 Chronic embolism and thrombosis of unspecified deep veins of left proximal lower extremity
        • I82.5Y3 …… bilateral
        • I82.5Y9 Chronic embolism and thrombosis of unspecified deep veins of unspecified proximal lower extremity
      • I82.5Z Chronic embolism and thrombosis of unspecified deep veins of distal lower extremity
        • I82.5Z1 Chronic embolism and thrombosis of unspecified deep veins of right distal lower extremity
        • I82.5Z2 Chronic embolism and thrombosis of unspecified deep veins of left distal lower extremity
        • I82.5Z3 …… bilateral
        • I82.5Z9 Chronic embolism and thrombosis of unspecified deep veins of unspecified distal lower extremity
    • I82.6 Acute embolism and thrombosis of veins of upper extremity
      • I82.60 Acute embolism and thrombosis of unspecified veins of upper extremity
        • I82.601 Acute embolism and thrombosis of unspecified veins of right upper extremity
        • I82.602 Acute embolism and thrombosis of unspecified veins of left upper extremity
        • I82.603 …… bilateral
        • I82.609 Acute embolism and thrombosis of unspecified veins of unspecified upper extremity
      • I82.61 Acute embolism and thrombosis of superficial veins of upper extremity
        • I82.611 Acute embolism and thrombosis of superficial veins of right upper extremity
        • I82.612 Acute embolism and thrombosis of superficial veins of left upper extremity
        • I82.613 …… bilateral
        • I82.619 Acute embolism and thrombosis of superficial veins of unspecified upper extremity
      • I82.62 Acute embolism and thrombosis of deep veins of upper extremity
        • I82.621 Acute embolism and thrombosis of deep veins of right upper extremity
        • I82.622 Acute embolism and thrombosis of deep veins of left upper extremity
        • I82.623 …… bilateral
        • I82.629 Acute embolism and thrombosis of deep veins of unspecified upper extremity
    • I82.7 Chronic embolism and thrombosis of veins of upper extremity
      • I82.70 Chronic embolism and thrombosis of unspecified veins of upper extremity
        • I82.701 Chronic embolism and thrombosis of unspecified veins of right upper extremity
        • I82.702 Chronic embolism and thrombosis of unspecified veins of left upper extremity
        • I82.703 …… bilateral
        • I82.709 Chronic embolism and thrombosis of unspecified veins of unspecified upper extremity
      • I82.71 Chronic embolism and thrombosis of superficial veins of upper extremity
        • I82.711 Chronic embolism and thrombosis of superficial veins of right upper extremity
        • I82.712 Chronic embolism and thrombosis of superficial veins of left upper extremity
        • I82.713 …… bilateral
        • I82.719 Chronic embolism and thrombosis of superficial veins of unspecified upper extremity
      • I82.72 Chronic embolism and thrombosis of deep veins of upper extremity
        • I82.721 Chronic embolism and thrombosis of deep veins of right upper extremity
        • I82.722 Chronic embolism and thrombosis of deep veins of left upper extremity
        • I82.723 …… bilateral
        • I82.729 Chronic embolism and thrombosis of deep veins of unspecified upper extremity
    • I82.A Embolism and thrombosis of axillary vein
      • I82.A1 Acute embolism and thrombosis of axillary vein
        • I82.A11 Acute embolism and thrombosis of right axillary vein
        • I82.A12 Acute embolism and thrombosis of left axillary vein
        • I82.A13 …… bilateral
        • I82.A19 Acute embolism and thrombosis of unspecified axillary vein
      • I82.A2 Chronic embolism and thrombosis of axillary vein
        • I82.A21 Chronic embolism and thrombosis of right axillary vein
        • I82.A22 Chronic embolism and thrombosis of left axillary vein
        • I82.A23 …… bilateral
        • I82.A29 Chronic embolism and thrombosis of unspecified axillary vein
    • I82.B Embolism and thrombosis of subclavian vein
      • I82.B1 Acute embolism and thrombosis of subclavian vein
        • I82.B11 Acute embolism and thrombosis of right subclavian vein
        • I82.B12 Acute embolism and thrombosis of left subclavian vein
        • I82.B13 …… bilateral
        • I82.B19 Acute embolism and thrombosis of unspecified subclavian vein
      • I82.B2 Chronic embolism and thrombosis of subclavian vein
        • I82.B21 Chronic embolism and thrombosis of right subclavian vein
        • I82.B22 Chronic embolism and thrombosis of left subclavian vein
        • I82.B23 …… bilateral
        • I82.B29 Chronic embolism and thrombosis of unspecified subclavian vein
    • I82.C Embolism and thrombosis of internal jugular vein
      • I82.C1 Acute embolism and thrombosis of internal jugular vein
        • I82.C11 Acute embolism and thrombosis of right internal jugular vein
        • I82.C12 Acute embolism and thrombosis of left internal jugular vein
        • I82.C13 …… bilateral
        • I82.C19 Acute embolism and thrombosis of unspecified internal jugular vein
      • I82.C2 Chronic embolism and thrombosis of internal jugular vein
        • I82.C21 Chronic embolism and thrombosis of right internal jugular vein
        • I82.C22 Chronic embolism and thrombosis of left internal jugular vein
        • I82.C23 …… bilateral
        • I82.C29 Chronic embolism and thrombosis of unspecified internal jugular vein
    • I82.8 Embolism and thrombosis of other specified veins
      • I82.81 Embolism and thrombosis of superficial veins of lower extremities
        • I82.811 Embolism and thrombosis of superficial veins of right lower extremity
        • I82.812 Embolism and thrombosis of superficial veins of left lower extremity
        • I82.813 …… bilateral
        • I82.819 Embolism and thrombosis of superficial veins of unspecified lower extremity
      • I82.89 Embolism and thrombosis of other specified veins
        • I82.890 Acute embolism and thrombosis of other specified veins
        • I82.891 Chronic embolism and thrombosis of other specified veins
    • I82.9 Embolism and thrombosis of unspecified vein
      • I82.90 Acute embolism and thrombosis of unspecified vein
      • I82.91 Chronic embolism and thrombosis of unspecified vein