ICD-10 code for follicular lymphoma

The ICD-10-CM code for follicular lymphoma is C82.90 (Follicular lymphoma, unspecified, unspecified site). The official index lists 98 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on C82.90.

Within C82.9, choose C82.90 (unspecified site) only when documentation doesn't support a more specific option: lymph nodes of head, face, and neck (C82.91), intrathoracic lymph nodes (C82.92), intra-abdominal lymph nodes (C82.93), lymph nodes of axilla and upper limb (C82.94), lymph nodes of inguinal region and lower limb (C82.95), intrapelvic lymph nodes (C82.96), spleen (C82.97), lymph nodes of multiple sites (C82.98) and 2 more.

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 820 (Lymphoma and Leukemia with Major O.R. Procedures with MCC, relative weight 6.2481), DRG 821 (Lymphoma and Leukemia with Major O.R. Procedures with CC, relative weight 2.2023), DRG 822 (Lymphoma and Leukemia with Major O.R. Procedures without CC/MCC, relative weight 1.1272), DRG 823 (Lymphoma and Non-Acute Leukemia with Other Procedures with MCC, relative weight 4.6059), DRG 824 (Lymphoma and Non-Acute Leukemia with Other Procedures with CC, relative weight 2.2515), DRG 825 (Lymphoma and Non-Acute Leukemia with Other Procedures without CC/MCC, relative weight 1.2995) and 3 more, in MDC 17 (Myeloproliferative Diseases and Disorders, Poorly Differentiated Neoplasms), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.