2025 ICD-10-CM Diagnosis Code C86.3

Subcutaneous panniculitis-like T-cell lymphoma

C86.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
ICD-10-CM C86.3 is a new 2025 ICD-10-CM code that became effective on October 1, 2024.
This is the American ICD-10-CM version of C86.3 – other international versions of ICD-10 C86.3 may differ.

The following code(s) above C86.3 contain annotation back-references

that may be applicable to C86.3:

Approximate Synonyms

Clinical Information

A cytotoxic primary cutaneous t-cell lymphoma. Recent studies suggest there are at least two groups of subcutaneous panniculitis-like t-cell lymphomas, each with distinct histologic features, immunophenotypic profile, and prognosis. One group has an alpha/beta, cd8 positive phenotype, involves only subcutaneous tissues, and usually has an indolent clinical course. The second group has a gamma/delta phenotype, is cd8 negative, often co-expresses cd56, is not confined to the subcutaneous tissues, and usually has a poor prognosis. In the recent who-eortc classification, the term subcutaneous panniculitis-like t-cell lymphoma is reserved for cases with an alpha/beta, cd8 positive phenotype. Cases with a gamma/delta phenotype are included in the group of cutaneous gamma/delta t-cell lymphomas.

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
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change
2024 (effective 10/1/2023): No change
2025 (effective 10/1/2024): Deleted code
2025 (effective 10/1/2024): New code

Diagnosis Index entries containing back-references to C86.3: