Follicular lymphoma (C82) ICD-10-CM
The C82 code range covers follicular lymphoma with 109 ICD-10-CM diagnosis codes. 99 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- follicular lymphoma with or without diffuse areas
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the C82 Range 109 codes · 99 billable
- C82 Follicular lymphomaNon-billable
- C82.0 Follicular lymphoma grade INon-billable
- C82.00 Follicular lymphoma grade I, unspecified site
- C82.01 Follicular lymphoma grade I, lymph nodes of head, face, and neck
- C82.02 Follicular lymphoma grade I, intrathoracic lymph nodes
- C82.03 Follicular lymphoma grade I, intra-abdominal lymph nodes
- C82.04 Follicular lymphoma grade I, lymph nodes of axilla and upper limb
- C82.05 Follicular lymphoma grade I, lymph nodes of inguinal region and lower limb
- C82.06 Follicular lymphoma grade I, intrapelvic lymph nodes
- C82.07 Follicular lymphoma grade I, spleen
- C82.08 Follicular lymphoma grade I, lymph nodes of multiple sites
- C82.09 Follicular lymphoma grade I, extranodal and solid organ sites
- C82.0A Follicular lymphoma grade I, in remission
- C82.1 Follicular lymphoma grade IINon-billable
- C82.10 Follicular lymphoma grade II, unspecified site
- C82.11 Follicular lymphoma grade II, lymph nodes of head, face, and neck
- C82.12 Follicular lymphoma grade II, intrathoracic lymph nodes
- C82.13 Follicular lymphoma grade II, intra-abdominal lymph nodes
- C82.14 Follicular lymphoma grade II, lymph nodes of axilla and upper limb
- C82.15 Follicular lymphoma grade II, lymph nodes of inguinal region and lower limb
- C82.16 Follicular lymphoma grade II, intrapelvic lymph nodes
- C82.17 Follicular lymphoma grade II, spleen
- C82.18 Follicular lymphoma grade II, lymph nodes of multiple sites
- C82.19 Follicular lymphoma grade II, extranodal and solid organ sites
- C82.1A Follicular lymphoma grade II, in remission
- C82.2 Follicular lymphoma grade III, unspecifiedNon-billable
- C82.20 Follicular lymphoma grade III, unspecified, unspecified site
- C82.21 Follicular lymphoma grade III, unspecified, lymph nodes of head, face, and neck
- C82.22 Follicular lymphoma grade III, unspecified, intrathoracic lymph nodes
- C82.23 Follicular lymphoma grade III, unspecified, intra-abdominal lymph nodes
- C82.24 Follicular lymphoma grade III, unspecified, lymph nodes of axilla and upper limb
- C82.25 Follicular lymphoma grade III, unspecified, lymph nodes of inguinal region and lower limb
- C82.26 Follicular lymphoma grade III, unspecified, intrapelvic lymph nodes
- C82.27 Follicular lymphoma grade III, unspecified, spleen
- C82.28 Follicular lymphoma grade III, unspecified, lymph nodes of multiple sites
- C82.29 Follicular lymphoma grade III, unspecified, extranodal and solid organ sites
- C82.2A Follicular lymphoma grade III, unspecified, in remission
- C82.3 Follicular lymphoma grade IIIaNon-billable
- C82.30 Follicular lymphoma grade IIIa, unspecified site
- C82.31 Follicular lymphoma grade IIIa, lymph nodes of head, face, and neck
- C82.32 Follicular lymphoma grade IIIa, intrathoracic lymph nodes
- C82.33 Follicular lymphoma grade IIIa, intra-abdominal lymph nodes
- C82.34 Follicular lymphoma grade IIIa, lymph nodes of axilla and upper limb
- C82.35 Follicular lymphoma grade IIIa, lymph nodes of inguinal region and lower limb
- C82.36 Follicular lymphoma grade IIIa, intrapelvic lymph nodes
- C82.37 Follicular lymphoma grade IIIa, spleen
- C82.38 Follicular lymphoma grade IIIa, lymph nodes of multiple sites
- C82.39 Follicular lymphoma grade IIIa, extranodal and solid organ sites
- C82.3A Follicular lymphoma grade IIIa, in remission
- C82.4 Follicular lymphoma grade IIIbNon-billable
- C82.40 Follicular lymphoma grade IIIb, unspecified site
- C82.41 Follicular lymphoma grade IIIb, lymph nodes of head, face, and neck
- C82.42 Follicular lymphoma grade IIIb, intrathoracic lymph nodes
- C82.43 Follicular lymphoma grade IIIb, intra-abdominal lymph nodes
- C82.44 Follicular lymphoma grade IIIb, lymph nodes of axilla and upper limb
- C82.45 Follicular lymphoma grade IIIb, lymph nodes of inguinal region and lower limb
- C82.46 Follicular lymphoma grade IIIb, intrapelvic lymph nodes
- C82.47 Follicular lymphoma grade IIIb, spleen
- C82.48 Follicular lymphoma grade IIIb, lymph nodes of multiple sites
- C82.49 Follicular lymphoma grade IIIb, extranodal and solid organ sites
- C82.4A Follicular lymphoma grade IIIb, in remission
- C82.5 Diffuse follicle center lymphomaNon-billable
- C82.50 Diffuse follicle center lymphoma, unspecified site
- C82.51 Diffuse follicle center lymphoma, lymph nodes of head, face, and neck
- C82.52 Diffuse follicle center lymphoma, intrathoracic lymph nodes
- C82.53 Diffuse follicle center lymphoma, intra-abdominal lymph nodes
- C82.54 Diffuse follicle center lymphoma, lymph nodes of axilla and upper limb
- C82.55 Diffuse follicle center lymphoma, lymph nodes of inguinal region and lower limb
- C82.56 Diffuse follicle center lymphoma, intrapelvic lymph nodes
- C82.57 Diffuse follicle center lymphoma, spleen
- C82.58 Diffuse follicle center lymphoma, lymph nodes of multiple sites
- C82.59 Diffuse follicle center lymphoma, extranodal and solid organ sites
- C82.5A Diffuse follicle center lymphoma, in remission
- C82.6 Cutaneous follicle center lymphomaNon-billable
- C82.60 Cutaneous follicle center lymphoma, unspecified site
- C82.61 Cutaneous follicle center lymphoma, lymph nodes of head, face, and neck
- C82.62 Cutaneous follicle center lymphoma, intrathoracic lymph nodes
- C82.63 Cutaneous follicle center lymphoma, intra-abdominal lymph nodes
- C82.64 Cutaneous follicle center lymphoma, lymph nodes of axilla and upper limb
- C82.65 Cutaneous follicle center lymphoma, lymph nodes of inguinal region and lower limb
- C82.66 Cutaneous follicle center lymphoma, intrapelvic lymph nodes
- C82.67 Cutaneous follicle center lymphoma, spleen
- C82.68 Cutaneous follicle center lymphoma, lymph nodes of multiple sites
- C82.69 Cutaneous follicle center lymphoma, extranodal and solid organ sites
- C82.6A Cutaneous follicle center lymphoma, in remission
- C82.8 Other types of follicular lymphomaNon-billable
- C82.80 Other types of follicular lymphoma, unspecified site
- C82.81 Other types of follicular lymphoma, lymph nodes of head, face, and neck
- C82.82 Other types of follicular lymphoma, intrathoracic lymph nodes
- C82.83 Other types of follicular lymphoma, intra-abdominal lymph nodes
- C82.84 Other types of follicular lymphoma, lymph nodes of axilla and upper limb
- C82.85 Other types of follicular lymphoma, lymph nodes of inguinal region and lower limb
- C82.86 Other types of follicular lymphoma, intrapelvic lymph nodes
- C82.87 Other types of follicular lymphoma, spleen
- C82.88 Other types of follicular lymphoma, lymph nodes of multiple sites
- C82.89 Other types of follicular lymphoma, extranodal and solid organ sites
- C82.8A Other types of follicular lymphoma, in remission
- C82.9 Follicular lymphoma, unspecifiedNon-billable
- C82.90 Follicular lymphoma, unspecified, unspecified site
- C82.91 Follicular lymphoma, unspecified, lymph nodes of head, face, and neck
- C82.92 Follicular lymphoma, unspecified, intrathoracic lymph nodes
- C82.93 Follicular lymphoma, unspecified, intra-abdominal lymph nodes
- C82.94 Follicular lymphoma, unspecified, lymph nodes of axilla and upper limb
- C82.95 Follicular lymphoma, unspecified, lymph nodes of inguinal region and lower limb
- C82.96 Follicular lymphoma, unspecified, intrapelvic lymph nodes
- C82.97 Follicular lymphoma, unspecified, spleen
- C82.98 Follicular lymphoma, unspecified, lymph nodes of multiple sites
- C82.99 Follicular lymphoma, unspecified, extranodal and solid organ sites
- C82.9A Follicular lymphoma, unspecified, in remission
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the C82 range.
Follicular Lymphoma with Predominantly Diffuse Growth Pattern
A lymphoma with the morphologic and immunophenotypic features of a follicular lymphoma characterized by the presence of a diffuse growth pattern with only focal and usually small micronodular foci.
Grade 1 Follicular Lymphoma
A follicular lymphoma which contains up to 5 centroblasts per 40X high-power microscopic field.
Grade 2 Follicular Lymphoma
A follicular lymphoma which contains 6-15 centroblasts per 40X high-power microscopic field.
Grade 3 Follicular Lymphoma
A follicular lymphoma which contains more than 15 centroblasts per 40X high-power microscopic field.
Grade 3a Follicular Lymphoma
A grade 3 follicular lymphoma in which small centrocytes are present.
Grade 3b Follicular Lymphoma
A grade 3 follicular lymphoma composed of solid sheets of centroblasts.
Lymphoma, Follicular
Malignant lymphoma in which the lymphomatous cells are clustered into identifiable nodules within the LYMPH NODES. The nodules resemble to some extent the GERMINAL CENTER of lymph node follicles and most likely represent neoplastic proliferation of lymph node-derived follicular center B-LYMPHOCYTES.
Primary Cutaneous Follicle Center Lymphoma
A primary lymphoma of the skin composed of various numbers of small and large irregular neoplastic follicle center cells. Its morphologic pattern can be nodular, diffuse, or nodular and diffuse. It presents with solitary or grouped plaques and tumors, and it usually involves the scalp, forehead, or trunk. It rarely involves the legs. This type of cutaneous lymphoma tends to remain localized to the skin.
About the C82 Code Range
Follicular lymphoma is a cancer whose cells form recognizable clusters within lymph nodes.
The subdivisions first separate grades I, II, and III. Grade III is further identified as unspecified, IIIa, or IIIb. Other groups identify diffuse follicle center lymphoma, cutaneous follicle center lymphoma, other types, and unspecified follicular lymphoma. Within these groups, codes distinguish lymph node regions, the spleen, multiple sites, sites outside lymph nodes, unspecified sites, and remission.
Questions About This Page
How many billable codes are in the C82 range?
Of the 109 codes in this range, 99 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the C82 range classify?
The range classifies follicular lymphoma. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
