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ICD-10-CM 2027

ICD-10 code for BALT lymphoma

C88.4

Extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue [MALT-lymphoma]

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Lymphoma (of) (malignant) › BALT”. Page updated September 29, 2026.

About coding BALT lymphoma

The ICD-10-CM code for BALT lymphoma is C88.4 (Extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue [MALT-lymphoma]).

Within C88 (malignant immunoproliferative diseases and certain other B-cell lymphomas), C88.4 is specifically for extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue [MALT-lymphoma]. Related codes cover Waldenstrom macroglobulinemia (C88.0), heavy chain disease (C88.2), immunoproliferative small intestinal disease (C88.3), other malignant immunoproliferative diseases (C88.8) and malignant immunoproliferative disease, unspecified (C88.9).

To report this condition, pick the subcode that matches the documentation: C88.40 (not having achieved remission) and C88.41 (in remission).

Don't report C88.4 together with the conditions in its Excludes1 note: high malignant (diffuse large B-cell) lymphoma (C83.3-).

Don't confuse with (Excludes1 for C88.4)

  • high malignant (diffuse large B-cell) lymphoma (C83.3-)

Common questions about BALT lymphoma ICD-10 codes

What is the ICD-10 code for BALT lymphoma?

C88.4 — Extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue [MALT-lymphoma] (a header code; report a more specific subcode).

Is C88.4 billable?

No. C88.4 is a header code. Report one of its more specific subcodes instead.