Is C84.ZA a billable ICD-10-CM code?

Yes. C84.ZA is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C84.ZA sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).

What cannot be coded together with C84.ZA?

C84.ZA carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C84.ZA (C84.Z, C84) and apply to it just the same.

C84.ZA

C84.ZA — Other mature T/NK-cell lymphomas, in remission

Billable / specific codeICD-10-CM

C84.ZA is a billable, specific ICD-10-CM code for other mature t/nk-cell lymphomas, in remission. It is valid for submission on a claim.

Excludes1 inherited from the categories above C84.ZA

These are not written on C84.ZA, but they bind it: a note on a category applies to every code beneath it. Billing C84.ZA with anything listed here is a denial.

Written on C84.Z — Other mature T/NK-cell lymphomas

angioimmunoblastic T-cell lymphoma (C86.50)
blastic NK-cell lymphoma (C86.40)
enteropathy-type T-cell lymphoma (C86.20)
extranodal NK-cell lymphoma, nasal type (C86.00)
hepatosplenic T-cell lymphoma (C86.10)
primary cutaneous CD30-positive T-cell proliferations (C86.60)
subcutaneous panniculitis-like T-cell lymphoma (C86.30)
T-cell leukemia (C91.1-)

Written on C84 — Mature T/NK-cell lymphomas

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

Other codes that can never be billed with C84.ZA

These codes carry an Excludes1 note pointing at C84.ZA. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C84.ZA alone.

C82Follicular lymphoma
C83.0Small cell B-cell lymphoma
C83.3Diffuse large B-cell lymphoma
C86Other specified types of T/NK-cell lymphoma

Risk adjustment

C84.ZA risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 20 Lung and Other Severe Cancers1.136 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

C84.ZA is named in 20 Medicare coverage policies — 20 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52479Oral Anticancer Drugs - Policy Article
A52479Oral Anticancer Drugs - Policy Article
A52479Oral Anticancer Drugs - Policy Article
A52479Oral Anticancer Drugs - Policy Article

Code history

What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.

addedFY2024-FY2026
Other mature T/NK-cell lymphomas, in remission

Related codes at this level

Codes that share C84.Z. If C84.ZA is not quite right, the correct code is usually one of these.

Questions about C84.ZA

Is C84.ZA a billable ICD-10-CM code?: Yes. C84.ZA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C84.ZA sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).
What cannot be coded together with C84.ZA?: C84.ZA carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C84.ZA (C84.Z, C84) and apply to it just the same.