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ICD-10-CM 2027 diagnosis code

D15.2Benign neoplasm of mediastinum

✓ Billable / specific

D15.2 is a valid, billable ICD-10-CM code for benign neoplasm of mediastinum. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About D15.2

D15.2 is the ICD-10-CM diagnosis code for benign neoplasm of mediastinum. It belongs to category D15 (benign neoplasm of other and unspecified intrathoracic organs), block D10-D36 (benign neoplasms, except benign neuroendocrine tumors) and chapter 2 (neoplasms). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within D15 (benign neoplasm of other and unspecified intrathoracic organs), D15.2 is specifically for benign neoplasm of mediastinum. Related codes cover thymus (D15.0), heart (D15.1), other specified intrathoracic organs (D15.7) and intrathoracic organ, unspecified (D15.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 180 (Respiratory Neoplasms with MCC, relative weight 1.7806), DRG 181 (Respiratory Neoplasms with CC, relative weight 1.0936) and DRG 182 (Respiratory Neoplasms without CC/MCC, relative weight 0.7439), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 212.5 (benign neoplasm of mediastinum).

Notes that apply from higher levels

Instructions written at a parent level also apply to D15.2.

› From D15 Benign neoplasm of other and unspecified intrathoracic organs
Excludes1
  • benign neoplasm of mesothelial tissue (D19.-)

Broader instructions also apply from Chapter 2: Neoplasms.

Table of Drugs & Neoplasms entries

Codes whose notes reference D15.2

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 212.5Benign neoplasm of mediastinumexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about D15.2

Is D15.2 billable?

Yes. D15.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can D15.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict D15.2 as a principal diagnosis.

Is D15.2 a CC or MCC?

No. D15.2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does D15.2 group to?

D15.2 is used in the MS-DRG v44.0 logic for MS-DRG 180 (Respiratory Neoplasms with MCC), MS-DRG 181 (Respiratory Neoplasms with CC) and MS-DRG 182 (Respiratory Neoplasms without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for D15.2?

The CMS General Equivalence Mappings map D15.2 to ICD-9-CM 212.5.