C82.83
BillableOther types of follicular lymphoma, intra-abdominal lymph nodes
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C82.83 an HCC code?
Yes. C82.83 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 C82.83
For C82.83 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 C82.83 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
C82.83 is the ICD-10-CM diagnosis code for other types of follicular lymphoma, intra-abdominal lymph nodes. This code describes a type of cancer called follicular lymphoma that is located in the lymph nodes within the abdominal cavity. Follicular lymphoma is a slow-growing blood cancer that starts in the immune system cells found in lymph nodes. C82.83 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, C82.83 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, C82.83 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.
Verify the specific anatomical site is documented as intra-abdominal (within the abdomen) rather than other lymph node locations, as this affects code selection. Because C82.83 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 C82.83 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the specific anatomical site is documented as intra-abdominal (within the abdomen) rather than other lymph node locations, as this affects code selection
- •Ensure the histology confirms follicular lymphoma type and that it is not a different lymphoma subtype, as C82 is specific to follicular lymphoma only
Clinical Significance
Other types of follicular lymphoma involving intra-abdominal lymph nodes captures rare follicular lymphoma variants affecting mesenteric, retroperitoneal, or other abdominal nodal groups. Intra-abdominal lymphoma may present with abdominal pain, early satiety, bowel obstruction, or be discovered incidentally on imaging. The 'other types' designation indicates a variant that does not fit standard grading or subtype categories.
Documentation Requirements
- ✓Pathology confirming the specific follicular lymphoma variant
- ✓Abdominal imaging documenting intra-abdominal lymph node involvement
- ✓Specification of involved node groups (mesenteric, retroperitoneal, celiac, etc.)
- ✓Assessment for complications (obstruction, compression)
- ✓Staging evaluation and treatment plan
Commonly Confused Codes
- •C82.53 — Diffuse follicle center lymphoma, intra-abdominal lymph nodes: Specific diffuse type
- •C82.93 — Follicular lymphoma, unspecified, intra-abdominal lymph nodes: Less specific code; use C82.83 when the variant type is identified
- •C82.89 — Other types of follicular lymphoma, extranodal and solid organ sites: Distinguish abdominal lymph nodes from abdominal organ involvement