FY2024
Effective from
- Inherited rules changed
Stage 2 necrotizing enterocolitis
Billable diagnosis code
CDC/NCHS · FY2024necrotizing enterocolitis of newborn (P77.-)
necrotizing enterocolitis of newborn (P77.-)
angioectasia (angiodysplasia) duodenum (K31.81-)
necrotizing enterocolitis due to Clostridium difficile (A04.7-)
Coverage depends on the payer, service and applicable policy. A billable code does not guarantee payment.
For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗First observed · 2016-10-01
Latest recorded change · FY2024
Effective from
Stage 2 necrotizing enterocolitis
Billable diagnosis code
CDC/NCHS · FY2024| All editions | Effective from | Code history |
|---|---|---|
| FY2017 | 2016-10-01 | Added |
| FY2018 | 2017-10-01 | Inherited rules changed |
| FY2019 | 2018-10-01 | No tabular change |
| FY2020 | 2019-10-01 | No tabular change |
| FY2020 · April | 2020-04-01 | No tabular change |
| FY2021 | 2020-10-01 | No tabular change |
| FY2021 · 01-01 | 2021-01-01 | No tabular change |
| FY2022 | 2021-10-01 | No tabular change |
| FY2022 · 04-01 | 2022-04-01 | No tabular change |
| FY2023 | 2022-10-01 | No tabular change |
| FY2023 · 04-01 | 2023-04-01 | No tabular change |
| FY2024 | 2023-10-01 | Inherited rules changed |
| FY2024 · 04-01 | 2024-04-01 | No tabular change |
| FY2025 | 2024-10-01 | No tabular change |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | No tabular change |
| FY2026 · April | 2026-04-01 | No tabular change |
| FY2027 | 2026-10-01 | No tabular change |
Historical mapping only; not an automatic code substitution.
Necrotizing enterocolitis with pneumatosis, without perforation
necrotizing enterocolitis of newborn (P77.-)
angioectasia (angiodysplasia) duodenum (K31.81-)
necrotizing enterocolitis of newborn (P77.-)
necrotizing enterocolitis due to Clostridium difficile (A04.7-)
Historical assignments from the CDC conversion table support data retrieval. They do not authorize substituting a previous code for the current code.
Previous assignment: K55.8
Other entries in the same category; these are not automatic substitutes.
| Code | Description | Category · further specificity required |
|---|---|---|
| K55.30 | Necrotizing enterocolitis, unspecified | Billable / specific |
| K55.31 | Stage 1 necrotizing enterocolitis | Billable / specific |
| K55.33 | Stage 3 necrotizing enterocolitis | Billable / specific |
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