C83.37 ICD-10-CM Code: Diffuse large B-cell lymphoma, spleen
C83.37 maps to CMS-HCC V28 20. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · free HCC coding tools
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
C83.37
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceDiffuse large B-cell lymphoma, spleen
A type of aggressive blood cancer (diffuse large B-cell lymphoma) affecting the spleen.
Buddy Insight
Diffuse large B-cell lymphoma of the spleen may present as primary splenic lymphoma or as part of disseminated disease.
CMS-HCC V28
MappedHCC 20
Coefficient HCC 20: 1.136 (Community Non-Dual Aged (CNA))
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
MappedHCC 010
Code-level coefficient reference
ESRD/PACE
MappedHCC 10
Code-level coefficient reference
RXHCC
MappedHCC 21
Code-level coefficient reference
Code Book Path
Inclusion Terms
Official- Anaplastic diffuse large B-cell lymphomaInherited from C83.3
- CD30-positive diffuse large B-cell lymphomaInherited from C83.3
- Centroblastic diffuse large B-cell lymphomaInherited from C83.3
- Diffuse large B-cell lymphoma, subtype not specifiedInherited from C83.3
- Immunoblastic diffuse large B-cell lymphomaInherited from C83.3
- Plasmablastic diffuse large B-cell lymphomaInherited from C83.3
- T-cell rich diffuse large B-cell lymphomaInherited from C83.3
Excludes 2
Official- Kaposi's sarcoma of lymph nodes (C46.3)Inherited from C81-C96
- secondary and unspecified neoplasm of lymph nodes (C77.-)Inherited from C81-C96
- secondary neoplasm of bone marrow (C79.52)Inherited from C81-C96
- secondary neoplasm of spleen (C78.89)Inherited from C81-C96
Related Codes
Includes
OfficialNo Includes notes are included in this display for C83.37. Check the code and parent instructions in the Code Book.
Excludes 1
Official- personal history of non-Hodgkin lymphoma (Z85.72)Inherited from C83, C83.3
- mediastinal (thymic) large B-cell lymphoma (C85.2-)Inherited from C83, C83.3
- mature T/NK-cell lymphomas (C84.-)Inherited from C83, C83.3
Code First
OfficialNo Code First sequencing instructions are included in this display for C83.37. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for C83.37. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for C83.37. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is C83.37 an HCC code?
Yes. C83.37 (Diffuse large B-cell lymphoma, spleen) maps to HCC 20, Lung and Other Severe Cancers under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 1.136. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.
Coder answer: C83.37 is billable and maps to V28 HCC 20, Lung and Other Severe Cancers. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- C83.37
- Description
- Diffuse large B-cell lymphoma, spleen
- HCC (V28)
- HCC 20 — Lung and Other Severe Cancers
- RAF reference coefficient
- 1.136
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.
Work C83.37 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for C83.37
For C83.37, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.
- 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
Coder workflow notes
Get the V28 mapping + MEAT cheat sheet
One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
C83.37 is the ICD-10-CM diagnosis code for diffuse large b-cell lymphoma, spleen. A type of aggressive blood cancer (diffuse large B-cell lymphoma) affecting the spleen. C83.37 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, C83.37 maps to Lung and Other Severe Cancers (HCC 20) with a source-labeled community, non-dual, aged reference coefficient of 1.136. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.
Splenic involvement is an extranodal site; confirm splenomegaly or splenic infiltration is documented. For C83.37, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. 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, source-labeled coefficient references, and MEAT documentation criteria for C83.37 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Splenic involvement is an extranodal site; confirm splenomegaly or splenic infiltration is documented
- •Note whether splenectomy was performed, as this may be relevant for treatment history
Clinical Significance
Diffuse large B-cell lymphoma of the spleen may present as primary splenic lymphoma or as part of disseminated disease. Primary splenic DLBCL is relatively rare and may present with splenomegaly, left upper quadrant pain, and cytopenias. Splenectomy may serve both diagnostic and therapeutic roles.
Documentation Requirements
- ✓Pathology confirmation from splenectomy specimen, splenic biopsy, or compatible flow cytometry
- ✓Imaging documenting splenic involvement (focal lesions or diffuse splenomegaly on CT/PET)
- ✓CBC documenting cytopenias if present
- ✓Splenectomy status and date if applicable
- ✓Assessment for concurrent nodal or other extranodal disease
Commonly Confused Codes
- •C83.33: DLBCL, intra-abdominal; spleen has its own code despite being an abdominal organ
- •C83.398: DLBCL, extranodal/solid organ; use C83.37 specifically for splenic involvement
- •C83.07: Small cell B-cell lymphoma, spleen; different, more indolent subtype
- •C96.4: Sarcoma of dendritic cells; rare splenic tumor that can mimic DLBCL