2019 ICD-10-CM Diagnosis Code K55.1

Chronic vascular disorders of intestine

    2016 2017 2018 2019 Billable/Specific Code
  • K55.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM K55.1 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of K55.1 - other international versions of ICD-10 K55.1 may differ.
Applicable To
  • Chronic ischemic colitis
  • Chronic ischemic enteritis
  • Chronic ischemic enterocolitis
  • Ischemic stricture of intestine
  • Mesenteric atherosclerosis
  • Mesenteric vascular insufficiency
The following code(s) above K55.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K55.1:
  • K00-K95
    2019 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • 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)
    Diseases of the digestive system
  • K55
    ICD-10-CM Diagnosis Code K55

    Vascular disorders of intestine

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • necrotizing enterocolitis of newborn (P77.-)
    Vascular disorders of intestine
Approximate Synonyms
  • Atherosclerotic disease of superior mesenteric artery
  • Chronic ischemic colitis
  • Chronic ischemic enteritis
  • Chronic ischemic enterocolitis
  • Chronic mesenteric ischemia
  • Chronic thrombosis of mesenteric vein
  • Chronic vascular insufficiency of intestine
  • Ischemic colitis, chronic
  • Ischemic enteritis, chronic
  • Ischemic enterocolitis, chronic
  • Ischemic stricture of intestine
  • Ischemic stricture, intestine
  • Mesenteric vein thrombosis, chronic
  • Occlusion of superior mesenteric artery
  • Superior mesenteric artery syndrome
  • Vascular insufficiency of intestine, chronic
ICD-10-CM K55.1 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 393 Other digestive system diagnoses with mcc
  • 394 Other digestive system diagnoses with cc
  • 395 Other digestive system diagnoses without cc/mcc

Convert K55.1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
Code annotations containing back-references to K55.1:
  • Type 1 Excludes: K56
    ICD-10-CM Diagnosis Code K56

    Paralytic ileus and intestinal obstruction without hernia

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • congenital stricture or stenosis of intestine (Q41-Q42)
    • cystic fibrosis with meconium ileus (E84.11)
    • ischemic stricture of intestine (K55.1)
    • meconium ileus NOS (P76.0)
    • neonatal intestinal obstructions classifiable to P76.-
    • obstruction of duodenum (K31.5)
    • postprocedural intestinal obstruction (K91.3-)
    • stenosis of anus or rectum (K62.4)
  • Type 2 Excludes: I70
    ICD-10-CM Diagnosis Code I70

    Atherosclerosis

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Includes
    • arteriolosclerosis
    • arterial degeneration
    • arteriosclerosis
    • arteriosclerotic vascular disease
    • arteriovascular degeneration
    • atheroma
    • endarteritis deformans or obliterans
    • senile arteritis
    • senile endarteritis
    • vascular degeneration
    Type 2 Excludes
    • arteriosclerotic cardiovascular disease (I25.1-)
    • arteriosclerotic heart disease (I25.1-)
    • atheroembolism (I75.-)
    • cerebral atherosclerosis (I67.2)
    • coronary atherosclerosis (I25.1-)
    • mesenteric atherosclerosis (K55.1)
    • precerebral atherosclerosis (I67.2)
    • primary pulmonary atherosclerosis (I27.0)
    Use Additional
    • code to identify:
    • 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)

Diagnosis Index entries containing back-references to K55.1:
  • Abdomen, abdominal - see also condition
    • angina K55.1
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) I20.9
    ICD-10-CM Diagnosis Code I20.9

    Angina pectoris, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Angina NOS
    • Anginal syndrome
    • Cardiac angina
    • Ischemic chest pain
    • abdominal K55.1
    • intestinal K55.1
    • mesenteric K55.1
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification) I70.90
    ICD-10-CM Diagnosis Code I70.90

    Unspecified atherosclerosis

      2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years)
    • mesenteric K55.1 (artery)
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) K52.9
    - see also Enteritis
    ICD-10-CM Diagnosis Code K52.9

    Noninfective gastroenteritis and colitis, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Colitis NOS
    • Enteritis NOS
    • Gastroenteritis NOS
    • Ileitis NOS
    • Jejunitis NOS
    • Sigmoiditis NOS
    Type 1 Excludes
    • diarrhea NOS (R19.7)
    • functional diarrhea (K59.1)
    • infectious gastroenteritis and colitis NOS (A09)
    • neonatal diarrhea (noninfective) (P78.3)
    • psychogenic diarrhea (F45.8)
    • ischemic K55.9
      ICD-10-CM Diagnosis Code K55.9

      Vascular disorder of intestine, unspecified

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Ischemic colitis
      • Ischemic enteritis
      • Ischemic enterocolitis
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
  • Disease, diseased - see also Syndrome
    • Wilkie's K55.1
  • Disorder (of) - see also Disease
    • intestine, intestinal
      • vascular K55.9
        ICD-10-CM Diagnosis Code K55.9

        Vascular disorder of intestine, unspecified

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Ischemic colitis
        • Ischemic enteritis
        • Ischemic enterocolitis
        • chronic K55.1
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
    ICD-10-CM Diagnosis Code K52.9

    Noninfective gastroenteritis and colitis, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Colitis NOS
    • Enteritis NOS
    • Gastroenteritis NOS
    • Ileitis NOS
    • Jejunitis NOS
    • Sigmoiditis NOS
    Type 1 Excludes
    • diarrhea NOS (R19.7)
    • functional diarrhea (K59.1)
    • infectious gastroenteritis and colitis NOS (A09)
    • neonatal diarrhea (noninfective) (P78.3)
    • psychogenic diarrhea (F45.8)
    • ischemic K55.9
      ICD-10-CM Diagnosis Code K55.9

      Vascular disorder of intestine, unspecified

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Ischemic colitis
      • Ischemic enteritis
      • Ischemic enterocolitis
      • chronic K55.1
  • Enterocolitis K52.9
    - see also Enteritis
    ICD-10-CM Diagnosis Code K52.9

    Noninfective gastroenteritis and colitis, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Colitis NOS
    • Enteritis NOS
    • Gastroenteritis NOS
    • Ileitis NOS
    • Jejunitis NOS
    • Sigmoiditis NOS
    Type 1 Excludes
    • diarrhea NOS (R19.7)
    • functional diarrhea (K59.1)
    • infectious gastroenteritis and colitis NOS (A09)
    • neonatal diarrhea (noninfective) (P78.3)
    • psychogenic diarrhea (F45.8)
    • hemorrhagic (acute) K55.059
      - see also Ischemia, intestine, acute
      ICD-10-CM Diagnosis Code K55.059

      Acute (reversible) ischemia of intestine, part and extent unspecified

        2017 - New Code 2018 2019 Billable/Specific Code
      • chronic K55.1
  • Insufficiency, insufficient
    • arterial I77.1
      ICD-10-CM Diagnosis Code I77.1

      Stricture of artery

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Narrowing of artery
      • mesenteric K55.1
    • vascular I99.8
      ICD-10-CM Diagnosis Code I99.8

      Other disorder of circulatory system

        2016 2017 2018 2019 Billable/Specific Code
      • mesenteric K55.1
    • mesenteric K55.1
  • Ischemia, ischemic I99.8
    ICD-10-CM Diagnosis Code I99.8

    Other disorder of circulatory system

      2016 2017 2018 2019 Billable/Specific Code
    • bowel (transient)
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
    • intestine (large) (small) (transient) K55.9
      ICD-10-CM Diagnosis Code K55.9

      Vascular disorder of intestine, unspecified

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Ischemic colitis
      • Ischemic enteritis
      • Ischemic enterocolitis
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
    • small bowel
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
    • colon chronic K55.1 (due to mesenteric artery insufficiency)
  • Stricture - see also Stenosis
    • intestine - see also Obstruction, intestine
      • ischemic K55.1
  • Syndrome - see also Disease
    • ischemic
      • bowel (transient) K55.9
        ICD-10-CM Diagnosis Code K55.9

        Vascular disorder of intestine, unspecified

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Ischemic colitis
        • Ischemic enteritis
        • Ischemic enterocolitis
        • chronic K55.1
        • due to mesenteric artery insufficiency K55.1
    • mesenteric
      • artery K55.1 (superior)
      • vascular insufficiency K55.1
    • superior
      • mesenteric artery K55.1
    • Wilkie's K55.1
  • Wilkie's disease or syndrome K55.1

ICD-10-CM Codes Adjacent To K55.1
K55.042 Diffuse acute infarction of large intestine
K55.049 …… extent unspecified
K55.05 Acute (reversible) ischemia of intestine, part unspecified
K55.051 Focal (segmental) acute (reversible) ischemia of intestine, part unspecified
K55.052 Diffuse acute (reversible) ischemia of intestine, part unspecified
K55.059 Acute (reversible) ischemia of intestine, part and extent unspecified
K55.06 Acute infarction of intestine, part unspecified
K55.061 Focal (segmental) acute infarction of intestine, part unspecified
K55.062 Diffuse acute infarction of intestine, part unspecified
K55.069 Acute infarction of intestine, part and extent unspecified
K55.1 Chronic vascular disorders of intestine
K55.2 Angiodysplasia of colon
K55.20 …… without hemorrhage
K55.21 …… with hemorrhage
K55.3 Necrotizing enterocolitis
K55.30 …… unspecified
K55.31 Stage 1 necrotizing enterocolitis
K55.32 Stage 2 necrotizing enterocolitis
K55.33 Stage 3 necrotizing enterocolitis
K55.8 Other vascular disorders of intestine
K55.9 Vascular disorder of intestine, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.