D15.0 vs D21.3
D15.0 (Benign neoplasm of thymus) compared with D21.3 (Benign neoplasm of connective and other soft tissue of thorax), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. D21.3 carries an Excludes1 note covering D15.0: “benign neoplasm of thymus (D15.0)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| D15.0Benign neoplasm of thymus | D21.3Benign neoplasm of connective and other soft tissue of thorax | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of thymus is a billable ICD-10-CM diagnosis code (D15.0). | Benign neoplasm of connective and other soft tissue of thorax is a billable ICD-10-CM diagnosis code (D21.3). |
| Includes | — | benign neoplasm of blood vessel benign neoplasm of bursa benign neoplasm of cartilage benign neoplasm of fascia |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources