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K55.1

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Chronic vascular disorders of intestine

Filed alongside this entry 777

under Syndrome

Index entries, exactly as the book files them. This says they are listed together — not that any of them is documented in your chart.

Billable FY2027 2026-10-01 → 2027-09-30
How to use this page

Everything the published sources say about one code, on one page.

  1. Read the Excludes1 block first — it is the one that stops you coding this at all alongside another code.
  2. Excludes2, Code first, Use additional and Includes follow. A note inherited from a parent category is labelled with the category it came from, so you can see why it applies.
  3. Official Guidelines sit below. "Guidelines naming this code" cite the code or a range containing it; "Chapter guidance" is the general guidance for its chapter and is the weaker signal.
  4. Guideline text is quoted verbatim with its section number and page, so you can check it against the published document.
  5. Risk-model chips show which published CMS models map this code.

What this page does not do

  • Guidance is quoted, never paraphrased — a paraphrase of a coding rule is a different rule.
  • Medication candidates, where shown, are matched by condition *name* and are offered as candidates for you to judge. They are not "the drugs for this code".

All page guides →

Exclusions10never code together
K55code
Excludes1
  • necrotizing enterocolitis of newborn (P77.-)P77.-
Excludes2
  • angioectasia (angiodysplasia) duodenum (K31.81-)K31.81-
K00-K95chapter
Excludes2
  • certain conditions originating in the perinatal period (P04-P96)P04-P96
  • certain infectious and parasitic diseases (A00-B99)A00-B99
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
  • endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
  • injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
  • neoplasms (C00-D49)C00-D49
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes6
K55.1code
Inclusion terms
  • Chronic ischemic colitis
  • Chronic ischemic enteritis
  • Chronic ischemic enterocolitis
  • Ischemic stricture of intestine
  • Mesenteric atherosclerosis
  • Mesenteric vascular insufficiency
Official Guidelines1names this code

ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.

I.C.11 Chapter 11: Diseases of the Digestive System (K00-K95) names this code p.58

Reserved for future guideline expansion

Index entries leading here13
  • Abdomen, abdominal — see also condition
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) I20.9
  • Insufficiency, insufficient
  • Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification) I70.90
    • mesenteric (artery) K55.1
  • Syndrome — see also Disease
    • mesenteric
      • artery (superior) K55.1
      • vascular insufficiency K55.1
    • ischemic
      • bowel (transient) K55.9
        • chronic K55.1
        • due to mesenteric artery insufficiency K55.1
    • superior
      • mesenteric artery K55.1
    • Wilkie's K55.1
  • Ischemia, ischemic I99.8
    • bowel (transient)
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
    • intestine (large) (small) (transient) K55.9
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
    • small bowel
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
    • colon chronic (due to mesenteric artery insufficiency) K55.1
  • Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) K52.9
    • ischemic K55.9
      • chronic K55.1
      • due to mesenteric artery insufficiency K55.1
  • Enterocolitis K52.9
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
  • Disorder (of) — see also Disease
    • intestine, intestinal
  • Disease, diseased — see also Syndrome
  • Stricture — see also Stenosis
    • intestine — see also Obstruction, intestine
  • Wilkie's disease or syndrome K55.1
Alongside this code5same parent — K55
K55.0 Acute vascular disorders of intestine category K55.2 Angiodysplasia of colon category K55.3 Necrotizing enterocolitis category K55.8 Other vascular disorders of intestine K55.9 Vascular disorder of intestine, unspecified
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

CMS22HCC108 ESRD21HCC108 ESRD24HCC108 HHS08HHS_HCC042

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2027
Parent
K55
Block
K55-K64
Siblings
5

Present FY2018–FY2027.