2027 ICD-10-CM Diagnosis Code D15.2Benign neoplasm of mediastinum

ICD-10-CM Codes›C00–D49›D10-D36›D15

ICD-10-CM D15.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D15.2 is a billable ICD-10-CM diagnosis code for benign neoplasm of mediastinum. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 180 through 182. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.

Code Identity

ICD-10-CM Code
D15.2
Billable Status
Yes — Valid for Submission
Code Describes
Benign neoplasm of mediastinum
Short Description
Benign neoplasm of mediastinum
Same as the full description in the CMS dataset.
Parent Code
D15
Benign neoplasm of other and unspecified intrathoracic organs

Code Classification

ChapterC00–D49Neoplasms
SectionD10-D36Benign neoplasms, except benign neuroendocrine tumors
CategoryD15Benign neoplasm of other and unspecified intrathoracic organs
This CodeD15.2Benign neoplasm of mediastinum

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D15.2: 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.

From D15 Benign neoplasm of other and unspecified intrathoracic organs applies to 5 codes
  • benign neoplasm of mesothelial tissue (D19.-)

Notes

General instructions on how these codes are used.

From Chapter 2 (C00-D49) Neoplasms applies to 1,730 codes
  • 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 D15.2, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming D15.2: they are not reported together with it, unless the two conditions are unrelated.

  • D21.3 Benign neoplasm of connective and other soft tissue of thorax
    benign neoplasm of mediastinum (D15.2)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO073
Benign neoplasms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Benign Mediastinal Neoplasm

    a neoplasm that arises from the mediastinum and is characterized by the absence of atypical or malignant cytological and architectural features, and absence of invasive features or metastatic potential. representative examples include lipoma, leiomyoma, and schwannoma.

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
mediastinum, mediastinalC38.3C78.1–D15.2D38.3D49.89
mediastinum, mediastinal › anteriorC38.1C78.1–D15.2D38.3D49.89
mediastinum, mediastinal › posteriorC38.2C78.1–D15.2D38.3D49.89
substernalC38.1C78.1–D15.2D38.3D49.89

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 D15.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
212.5 Benign neo mediastinum
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D15.2Overview

What is the ICD-10 code for benign neoplasm of mediastinum?

The ICD-10-CM code for benign neoplasm of mediastinum is D15.2 (sometimes written as D152). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 181, 180, 182, with relative weights from 0.7436 to 1.7800 depending on complications. Higher weights mean higher Medicare reimbursement.

Can D15.2 be reported with a code from D19?

Not as a rule. The Excludes1 note at D15, which applies to D15.2, lists "benign neoplasm of mesothelial tissue (D19.-)". 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 D15.2?

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.