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ICD-10-CM Codes
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K00-K95
Diseases of the digestive system
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K55-K64
Other diseases of intestines
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K55-
Vascular disorders of intestine
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2021 ICD-10-CM Diagnosis Code K55.31
2021 ICD-10-CM Diagnosis Code K55.31
Stage 1 necrotizing enterocolitis
2017 - New Code 2018 2019 2020 2021 Billable/Specific Code
- K55.31 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2021 edition of ICD-10-CM K55.31 became effective on October 1, 2020.
- This is the American ICD-10-CM version of K55.31 - other international versions of ICD-10 K55.31 may differ.
Applicable To- Necrotizing enterocolitis without pneumatosis, without perforation
The following code(s) above
K55.31 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
K55.31:
- K00-K95
2021 ICD-10-CM Range K00-K95
Diseases of the digestive systemType 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)
- K55
ICD-10-CM Diagnosis Code K55
Vascular disorders of intestine
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Type 1 Excludes- necrotizing enterocolitis of newborn (P77.-)
- K55.3
ICD-10-CM Diagnosis Code K55.3
Necrotizing enterocolitis
2017 - New Code 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Type 1 Excludes- necrotizing enterocolitis of newborn (P77.-)
Type 2 Excludes- necrotizing enterocolitis due to Clostridium difficile (A04.7-)
- 393 Other digestive system diagnoses with mcc
- 394 Other digestive system diagnoses with cc
- 395 Other digestive system diagnoses without cc/mcc
- 791 Prematurity with major problems
- 793 Full term neonate with major problems
Convert K55.31 to ICD-9-CM
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
- Enterocolitis K52.9 - see also Enteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
2016 2017 2018 2019 2020 2021 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)
- necrotizing K55.30
ICD-10-CM Diagnosis Code K55.30
Necrotizing enterocolitis, unspecified
2017 - New Code 2018 2019 2020 2021 Billable/Specific Code
Applicable To- Necrotizing enterocolitis, NOS
- in non-newborn K55.30
ICD-10-CM Diagnosis Code K55.30
Necrotizing enterocolitis, unspecified
2017 - New Code 2018 2019 2020 2021 Billable/Specific Code
Applicable To- Necrotizing enterocolitis, NOS
- stage 1 K55.31 (without pneumatosis, without perforation)
- without pneumatosis or perforation K55.31
ICD-10-CM Codes Adjacent To K55.31
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
K55.3 Necrotizing enterocolitis
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
K56.4 Other impaction of intestine
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
