C84.A — Cutaneous T-cell lymphoma, unspecified

Not billable

Is C84.A billable?

No — C84.A is a non-billable header code. C84.A groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 11 billable codes beneath C84.A.

Billable codes under this header

C84.A at a glance

Code	C84.A
Description	Cutaneous T-cell lymphoma, unspecified
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

How is C84.A listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to C84.A. They show the wording a clinician may have documented, which often differs from the Tabular description.

Lymphoma › cutaneous T-cell (of) (malignant)

Excludes1 — never code together — inherited from C84

The conditions below can never be reported together with C84.A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

personal history of non-Hodgkin lymphoma (Z85.72)

Excludes2 — not included here — inherited from C81-C96

The conditions below are not part of C84.A, but a patient may have both at the same time. When documentation supports it, C84.A and the excluded code may both be reported.

Kaposi's sarcoma of lymph nodes (C46.3)
secondary and unspecified neoplasm of lymph nodes (C77.-)
secondary neoplasm of bone marrow (C79.52)
secondary neoplasm of spleen (C78.89)

What codes fall under C84.A? (11)

How long has C84.A existed?

C84.A has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which conditions are coded to C84.A?

ICD-10 code for Lymphoma