2027 ICD-10-CM Diagnosis Code D15.0Benign neoplasm of thymus
ICD-10-CM Codes›C00–D49›D10-D36›D15
- Billable — Valid for Submission
- Not Chronic
D15.0 is a billable ICD-10-CM diagnosis code for benign neoplasm of thymus. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 814 through 816. Coders also document this condition as benign neoplasm of superior mediastinum. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Benign neoplasm of superior mediastinum
- Benign neoplasm of thymus
- Benign thymoma
- Myasthenia gravis associated with thymoma
- Thymoma
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D15.0: its own notes plus those printed at D15 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- benign carcinoid tumor of the thymus (D3A.091)
Notes
General instructions on how these codes are used.
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name D15.0, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming D15.0: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Thymoma See Also: Neoplasm, thymus, by type;
microscopic D15.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Benign Thymus Neoplasm
a non-metastasizing neoplasm that arises from the thymus.
Table of NeoplasmsClinical
Patient EducationClinical
Benign Tumors
Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D15.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D15.0Overview
What is the ICD-10 code for benign neoplasm of thymus?
The ICD-10-CM code for benign neoplasm of thymus is D15.0 (sometimes written as D150). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D15.0 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report benign neoplasm of thymus on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D15.0 group to?
When benign neoplasm of thymus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 816, 814, 815, with relative weights from 0.7378 to 2.0727 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D15.0 be reported with D3A.091?
Not as a rule. The Excludes1 note on D15.0 lists "benign carcinoid tumor of the thymus (D3A.091)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of D15.0?
Under the General Equivalence Mappings, benign neoplasm of thymus converts to ICD-9-CM 212.6 (benign neoplasm thymus). The mapping is a direct match.
