C82.1 – Follicular lymphoma grade II

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of lymphoid, hematopoietic and related tissue

Non-billable header

ICD-10-CM code C82.1

Code: C82.1 (claims format: C821)
Description: Follicular lymphoma grade II
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: C82

Billable codes under C82.1

C82.1 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

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

C82 – Follicular lymphoma

Includes:

follicular lymphoma with or without diffuse areas

Excludes1 (not coded here):

mature T/NK-cell lymphomas (C84.-)
personal history of non-Hodgkin lymphoma (Z85.72)

Block C81-C96

Excludes2 (not included here):

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)

Index terms for C82.1

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

Lymphoma, follicular, grade, II

Related codes in C82

Frequently asked questions

What is ICD-10 code C82.1?

C82.1 is the ICD-10-CM code for follicular lymphoma grade II, in the block C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).

Is C82.1 a billable code?

No. C82.1 is a header code with more specific child codes; report one of the billable codes listed above.

What category does C82.1 belong to?

It belongs to category C82 – Follicular lymphoma.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.