C84.11

✓ Billable

Sézary disease, lymph nodes of head, face, and neck

Neoplasms (C00-D49)

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❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

C84

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

Clinical Description

ICD-10-CM code C84.11 represents sézary disease, lymph nodes of head, face, and neck. This code falls under the Neoplasms (C00-D49) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory. Coders should note that C84.11 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code C84.11?

ICD-10-CM code C84.11 is "Sézary disease, lymph nodes of head, face, and neck". It belongs to the category: Neoplasms (C00-D49).

Is C84.11 a billable ICD-10 code?

Yes, C84.11 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with C84.11?

C84.11 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Related Codes in C84.1

Other codes in the same category that may be relevant for differential coding:

C84.10Sézary disease, unspecified site C84.12Sézary disease, intrathoracic lymph nodes C84.13Sézary disease, intra-abdominal lymph nodes C84.14Sézary disease, lymph nodes of axilla and upper limb C84.15Sézary disease, lymph nodes of inguinal region and lower limb C84.16Sézary disease, intrapelvic lymph nodes C84.17Sézary disease, spleen C84.18Sézary disease, lymph nodes of multiple sites C84.19Sézary disease, extranodal and solid organ sites C84.1ASézary disease, in remission

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Code Information

CodeC84.11

BillableYes

ParentC84.1

CategoryNeoplasms (C00-D49)

Excludes11 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)