2026 ICD-10-CM Diagnosis Code D15.2Benign neoplasm of mediastinum
ICD-10-CM Codes›C00–D49›D10-D36›D15
- Billable — Valid for Submission
- Not Chronic
D15.2 is a billable ICD-10-CM diagnosis code for benign neoplasm of mediastinum. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 180 through 182. 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.
- Anterior mediastinum mass
- Benign mediastinal teratoma
- Benign neoplasm of lower anterior mediastinum
- Benign neoplasm of lower middle mediastinum
- Benign neoplasm of lower posterior mediastinum
- Benign neoplasm of mediastinum
- Benign neoplasm of posterior mediastinum
- Benign neoplasm of superior mediastinum
- Ganglioneuroma
- Ganglioneuroma of mediastinum
- Neoplasm of anterior mediastinum
- Neoplasm of posterior mediastinum
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Ganglioneuroma
a benign neoplasm that usually arises from the sympathetic trunk in the mediastinum. histologic features include spindle cell proliferation (resembling a neurofibroma) and the presence of large ganglion cells. the tumor may present clinically with horner syndrome or diarrhea due to ectopic production of vasoactive intestinal peptide. (from devita et al., cancer: principles and practice of oncology, 5th ed, p966)Horner Syndrome
a syndrome associated with defective sympathetic innervation to one side of the face, including the eye. clinical features include miosis; mild blepharoptosis; and hemifacial anhidrosis (decreased sweating)(see hypohidrosis). lesions of the brain stem; cervical spinal cord; first thoracic nerve root; apex of the lung; carotid artery; cavernous sinus; and apex of the orbit may cause this condition. (from miller et al., clinical neuro-ophthalmology, 4th ed, pp500-11)
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
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.
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Convert D15.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D15.2Overview
Is D15.2 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report benign neoplasm of mediastinum on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D15.2 group to?
When benign neoplasm of mediastinum is the principal diagnosis on an inpatient stay, it groups to MS-DRG 180, 181, 182, with relative weights from 0.7440 to 1.7660 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D15.2?
Under the General Equivalence Mappings, benign neoplasm of mediastinum converts to ICD-9-CM 212.5 (benign neo mediastinum). The mapping is a direct match.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
