ICD-10-CM 2027
ICD-10 code for eosinophilic granuloma
From the official ICD-10-CM alphabetic index entry “Granuloma › eosinophilic”. Page updated September 29, 2026.
About coding eosinophilic granuloma
The ICD-10-CM code for eosinophilic granuloma is C96.6 (Unifocal Langerhans-cell histiocytosis). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on C96.6.
Within C96 (other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissue), C96.6 is specifically for Unifocal Langerhans-cell histiocytosis. Related codes cover multifocal and multisystemic (disseminated) Langerhans-cell histiocytosis (C96.0), malignant mast cell neoplasm (C96.2), sarcoma of dendritic cells (accessory cells) (C96.4), multifocal and unisystemic Langerhans-cell histiocytosis (C96.5), malignant neoplasm of lymphoid, hematopoietic and related tissue, unspecified (C96.9), histiocytic sarcoma (C96.A) and other specified malignant neoplasms of lymphoid, hematopoietic and related tissue (C96.Z).
Don't report C96.6 together with the conditions in its Excludes1 note: multifocal and multisysemic (disseminated) Langerhans-cell histiocytosis (C96.0) and multifocal and unisystemic Langerhans-cell histiocytosis (C96.5).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific eosinophilic granuloma codes (official index)
Don't confuse with (Excludes1 for C96.6)
Common questions about eosinophilic granuloma ICD-10 codes
What is the ICD-10 code for eosinophilic granuloma?
- C96.6 — Unifocal Langerhans-cell histiocytosis. More specific codes apply when the documentation supports them: C96.6, C96.6, K13.4, L92.2.
What is the ICD-10 code for bone eosinophilic granuloma?
- C96.6 — Unifocal Langerhans-cell histiocytosis.
What is the ICD-10 code for lung eosinophilic granuloma?
- C96.6 — Unifocal Langerhans-cell histiocytosis.
What is the ICD-10 code for oral mucosa eosinophilic granuloma?
- K13.4 — Granuloma and granuloma-like lesions of oral mucosa.
What is the ICD-10 code for skin eosinophilic granuloma?
- L92.2 — Granuloma faciale [eosinophilic granuloma of skin].
Is C96.6 billable?
- Yes. C96.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can C96.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict C96.6 as a principal diagnosis.
Is C96.6 a CC or MCC?
- C96.6 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.