D15.0 — Benign neoplasm of thymus
D15.0 is a billable, specific ICD-10-CM code for benign neoplasm of thymus. It is valid for submission on a claim.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- benign carcinoid tumor of the thymus (D3A.091)
Excludes1 inherited from the categories above D15.0
These are not written on D15.0, but they bind it: a note on a category applies to every code beneath it. Billing D15.0 with anything listed here is a denial.
Other codes that can never be billed with D15.0
These codes carry an Excludes1 note pointing at D15.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading D15.0 alone.
Risk adjustment
D15.0 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
D15.0 is named in 11 Medicare coverage policies — 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
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How D15.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to D15.0.
- Thymoma›microscopic
Code history
D15.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share D15. If D15.0 is not quite right, the correct code is usually one of these.
Questions about D15.0
- Is D15.0 a billable ICD-10-CM code?
- Yes. D15.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does D15.0 sit in the tabular list?
- Neoplasms (C00-D49), in the block Benign neoplasms, except benign neuroendocrine tumors (D10-D36).
- What cannot be coded together with D15.0?
- D15.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above D15.0 (D15) and apply to it just the same.