C84.4A Peripheral T-cell lymphoma, not elsewhere classified, in remission

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from C84 Mature T/NK-cell lymphomas

Excludes1 (never code together)

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

Applies from C84.4 Peripheral T-cell lymphoma, not elsewhere classified

Applicable to

• Lennert's lymphoma
• Lymphoepithelioid lymphoma
• Mature T-cell lymphoma, not elsewhere classified

Risk adjustment (HCC)

• CMS-HCC V28: HCC 19 — Myelodysplastic Syndromes, Multiple Myeloma, and Other Cancers
• CMS-HCC V22: HCC 10 — Lymphoma and Other Cancers
• RxHCC V08: HCC 21 — Lymphomas and Other Hematologic Cancers
• ESRD V24: HCC 10

MS-DRG index

Defines the logic of DRG(s) 820-822 in MDC 17.

Code annotations containing back-references to C84.4A

Back-references to C84.4

• Type 1 Excludes: C84.0 Mycosis fungoides ("peripheral T-cell lymphoma, not elsewhere classified (C84.4-)")
• Type 1 Excludes: C84.9 Mature T/NK-cell lymphomas, unspecified ("mature T-cell lymphoma, not elsewhere classified (C84.4-)")

Back-references to C84

• Type 1 Excludes: C26.1 Malignant neoplasm of spleen ("non-Hodgkin lymphoma (C82-C85)")
• Type 1 Excludes: C76 Malignant neoplasm of other and ill-defined sites ("malignant neoplasm of lymphoid, hematopoietic and related tissue (C81-C96)")
• Type 1 Excludes: C77 Secondary and unspecified malignant neoplasm of lymph nodes ("malignant neoplasm of lymph nodes, specified as primary (C81-C86, C88, C96.-)")
• Type 1 Excludes: C82 Follicular lymphoma ("mature T/NK-cell lymphomas (C84.-)")
• Type 1 Excludes: C83.0 Small cell B-cell lymphoma ("mature T/NK-cell lymphomas (C84.-)")
• Type 1 Excludes: C83.3 Diffuse large B-cell lymphoma ("mature T/NK-cell lymphomas (C84.-)")
• Type 1 Excludes: C86 Other specified types of T/NK-cell lymphoma ("mature T/NK-cell lymphomas (C84.-)")
• Code Also: D47.02 Systemic mastocytosis ("non-Hodgkin lymphoma (C82-C85)")
• Code First: Z15.0 Genetic susceptibility to malignant neoplasm (", if applicable, any current malignant neoplasm (C00-C75, C81-C96)")

Nearby codes

• C84.45 Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of inguinal region and lower limb
• C84.46 Peripheral T-cell lymphoma, not elsewhere classified, intrapelvic lymph nodes
• C84.47 Peripheral T-cell lymphoma, not elsewhere classified, spleen
• C84.48 Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of multiple sites
• C84.49 Peripheral T-cell lymphoma, not elsewhere classified, extranodal and solid organ sites
• C84.4A Peripheral T-cell lymphoma, not elsewhere classified, in remission (this code)
• C84.6 Anaplastic large cell lymphoma, ALK-positive
• C84.60 Anaplastic large cell lymphoma, ALK-positive, unspecified site
• C84.61 Anaplastic large cell lymphoma, ALK-positive, lymph nodes of head, face, and neck
• C84.62 Anaplastic large cell lymphoma, ALK-positive, intrathoracic lymph nodes
• C84.63 Anaplastic large cell lymphoma, ALK-positive, intra-abdominal lymph nodes