C84.1 – Sezary disease

Code

C84.1 (claims format: C841)

Description

Sezary disease

Billable

No – use a more specific code below

Valid for

Dates of service October 1, 2026 – September 30, 2027 (FY2027)

Chapter

2. Neoplasms (C00-D49)

Block

C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue

Parent codes

C84

Billable codes under C84.1

C84.1 is a header code and cannot be used on claims. Choose the most specific code:

• C84.10 – Sezary disease, unspecified siteBillable
• C84.11 – Sezary disease, lymph nodes of head, face, and neckBillable
• C84.12 – Sezary disease, intrathoracic lymph nodesBillable
• C84.13 – Sezary disease, intra-abdominal lymph nodesBillable
• C84.14 – Sezary disease, lymph nodes of axilla and upper limbBillable
• C84.15 – Sezary disease, lymph nodes of inguinal region and lower limbBillable
• C84.16 – Sezary disease, intrapelvic lymph nodesBillable
• C84.17 – Sezary disease, spleenBillable
• C84.18 – Sezary disease, lymph nodes of multiple sitesBillable
• C84.19 – Sezary disease, extranodal and solid organ sitesBillable
• C84.1A – Sezary disease, in remissionBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

C84 – Mature T/NK-cell lymphomas

Block C81-C96

Index terms for C84.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

• Sézary disease
• Disease, diseased, Sézary

Related codes in C84

• C84.0 – Mycosis fungoidesHeader
• C84.4 – Peripheral T-cell lymphoma, not elsewhere classifiedHeader
• C84.6 – Anaplastic large cell lymphoma, ALK-positiveHeader
• C84.7 – Anaplastic large cell lymphoma, ALK-negativeHeader
• C84.A – Cutaneous T-cell lymphoma, unspecifiedHeader
• C84.Z – Other mature T/NK-cell lymphomasHeader
• C84.9 – Mature T/NK-cell lymphomas, unspecifiedHeader