2022 ICD-10-CM Diagnosis Code K55.3

Necrotizing enterocolitis

    2017 - New Code 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
  • K55.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2022 edition of ICD-10-CM K55.3 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of K55.3 - other international versions of ICD-10 K55.3 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K55.3. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • necrotizing enterocolitis of newborn (
    ICD-10-CM Diagnosis Code P77
    • P77 Necrotizing enterocolitis of newborn
      • P77.1 Stage 1 necrotizing enterocolitis in newborn
      • P77.2 Stage 2 necrotizing enterocolitis in newborn
      • P77.3 Stage 3 necrotizing enterocolitis in newborn
      • P77.9 Necrotizing enterocolitis in newborn, unspeci...
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 (K55.3) and the excluded code together.
  • necrotizing enterocolitis due to Clostridium difficile (
    ICD-10-CM Diagnosis Code A04.7

    Enterocolitis due to Clostridium difficile

      2016 2017 2018 - Converted to Parent Code 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Applicable To
    • Foodborne intoxication by Clostridium difficile
    • Pseudomembraneous colitis
The following code(s) above K55.3 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 K55.3:
  • K00-K95
    2022 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 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • necrotizing enterocolitis of newborn (P77.-)
    Vascular disorders of intestine
Code History
  • 2017 (effective 10/1/2016): New code
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
ICD-10-CM Codes Adjacent To K55.3
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
K56 Paralytic ileus and intestinal obstruction without hernia
K56.0 Paralytic ileus
K56.1 Intussusception
K56.2 Volvulus

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