D15.0 ICD-10-CM Code: Benign neoplasm of thymus
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) / Benign neoplasms, except benign neuroendocrine tumors (D10-D36)
D15.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceBenign neoplasm of thymus
A non-cancerous tumor that grows in the thymus gland, which is located in the chest behind the breastbone and helps develop immune cells.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for D15.0 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D15.0 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D15.0 in this effective period.
Excludes 1
Official- benign carcinoid tumor of the thymus (D3A.091)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D15.0 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D15.0 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D15.0 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is D15.0 an HCC code?
No. D15.0 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
D15.0 is the ICD-10-CM diagnosis code for benign neoplasm of thymus. A non-cancerous tumor that grows in the thymus gland, which is located in the chest behind the breastbone and helps develop immune cells. D15.0 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering benign neoplasms, except benign neuroendocrine tumors (d10-d36).
D15.0 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Verify the benign nature of the neoplasm is confirmed by pathology or imaging before coding.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D15.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the benign nature of the neoplasm is confirmed by pathology or imaging before coding
- •Distinguish from malignant thymic neoplasms (C37.x) which require different coding
Excludes 1, Do NOT code together
- benign carcinoid tumor of the thymus (D3A.091)