C82.47
BillableFollicular lymphoma grade IIIb, spleen
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C82.47 an HCC code?
Yes. C82.47 maps to Breast, Prostate, Colorectal and Other Cancers and Tumors under the CMS-HCC V28 risk adjustment model (and Lymphoma and Other Cancers under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for C82.47
For C82.47 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed C82.47 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
C82.47 is the ICD-10-CM diagnosis code for follicular lymphoma grade iiib, spleen. A type of cancer of the lymph system (follicular lymphoma) in an advanced stage, located in the spleen. C82.47 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of lymphoid, hematopoietic and related tissue (c81-c96).
Under the CMS-HCC V28 risk adjustment model, C82.47 maps to Breast, Prostate, Colorectal and Other Cancers and Tumors (HCC 21) with a community, non-dual, aged base RAF weight of 0.545. Under the older CMS-HCC V24 model, C82.47 maps to Lymphoma and Other Cancers (HCC 10) with a community, non-dual, aged base RAF weight of 0.675. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Splenic involvement should be confirmed by imaging or pathology; document whether splenectomy is planned or performed. Because C82.47 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for C82.47 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Splenic involvement should be confirmed by imaging or pathology; document whether splenectomy is planned or performed
- •Grade IIIb indicates aggressive disease; note any systemic symptoms or cytopenias related to splenic involvement
Clinical Significance
Follicular lymphoma grade IIIb with splenic involvement represents an aggressive variant of follicular lymphoma with large centroblastic cells and no residual centrocytes. Splenic disease often indicates advanced staging (typically stage IV) and may present with cytopenias due to hypersplenism or marrow infiltration. This carries a significantly different prognosis than lower-grade follicular lymphomas and often requires immediate treatment rather than watchful waiting.
Documentation Requirements
- ✓Pathology report confirming grade IIIb (centroblasts only, no centrocytes)
- ✓Imaging (CT/PET) confirming splenic involvement with measurements
- ✓Ann Arbor staging designation (typically stage III or IV with splenic disease)
- ✓B-symptom documentation (fevers, night sweats, weight loss >10%)
- ✓Current treatment status and regimen (active treatment vs. observation)
- ✓Bone marrow biopsy results if performed
Commonly Confused Codes
- •C82.37 — Follicular lymphoma grade IIIa, spleen: Grade IIIa retains centrocytes mixed with centroblasts, while IIIb has centroblasts only; pathology report must specify the subgrade
- •C82.57 — Diffuse follicle center lymphoma, spleen: This is a different histologic pattern (diffuse vs. follicular architecture); confirm growth pattern on biopsy
- •C82.87 — Other types of follicular lymphoma, spleen: Use C82.47 when grade IIIb is specifically documented rather than this less-specific alternative
- •C83.37 — Diffuse large B-cell lymphoma, spleen: Grade IIIb follicular lymphoma closely resembles diffuse large B-cell lymphoma but retains some follicular architecture; pathology distinction is critical