C83.77
BillableBurkitt lymphoma, spleen
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C83.77 an HCC code?
Yes. C83.77 maps to Lung and Other Severe Cancers 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 C83.77
For C83.77to 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 C83.77 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
C83.77 is the ICD-10-CM diagnosis code for burkitt lymphoma, spleen. Burkitt lymphoma affecting the spleen, which is part of the lymphatic system. C83.77 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, C83.77 maps to Lung and Other Severe Cancers (HCC 20) with a community, non-dual, aged base RAF weight of 1.136. Under the older CMS-HCC V24 model, C83.77 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.
Confirm splenic involvement through imaging (CT, ultrasound) or pathology documentation. Because C83.77 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 C83.77 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm splenic involvement through imaging (CT, ultrasound) or pathology documentation
- •Use this code when the spleen is the primary or only documented site of involvement
Clinical Significance
Burkitt lymphoma of the spleen is an extremely aggressive B-cell non-Hodgkin lymphoma characterized by rapid tumor doubling time. Splenic involvement indicates advanced disease that requires urgent treatment, typically with intensive chemo-immunotherapy regimens. Accurate capture is critical for risk adjustment as this represents a high-acuity malignancy with significant resource utilization.
Documentation Requirements
- ✓Pathology or biopsy report confirming Burkitt lymphoma histologic subtype (not just 'lymphoma' or 'non-Hodgkin lymphoma')
- ✓Imaging (CT, PET/CT, or ultrasound) confirming splenic involvement
- ✓Current disease status: active disease vs. treatment response vs. remission
- ✓Ann Arbor staging classification if documented
- ✓Treatment plan or current treatment regimen
Commonly Confused Codes
- •C83.87 — Other non-follicular lymphoma, spleen: Use C83.77 specifically when pathology confirms Burkitt subtype; C83.87 is for other non-follicular types like mantle cell or marginal zone
- •C83.77 vs. C83.7A — If Burkitt lymphoma is in remission regardless of original site, use C83.7A, not the active site-specific code
- •C85.17 — Unspecified B-cell lymphoma, spleen: Use only when the specific lymphoma subtype cannot be determined; Burkitt should always be coded to C83.77 when confirmed