Skip to content
Dx

ICD-10-CM 2027 diagnosis code

J98.2Interstitial emphysema

✓ Billable / specific

J98.2 is a valid, billable ICD-10-CM code for interstitial emphysema. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Pneumomediastinum, ICD-10 code for Interstitial emphysema.

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 J98.2

J98.2 is the ICD-10-CM diagnosis code for interstitial emphysema. It belongs to category J98 (other respiratory disorders), block J96-J99 (other diseases of the respiratory system) and chapter 10 (diseases of the respiratory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within J98 (other respiratory disorders), J98.2 is specifically for interstitial emphysema. Related codes cover diseases of bronchus, not elsewhere classified (J98.0), pulmonary collapse (J98.1), Compensatory emphysema (J98.3), other disorders of lung (J98.4), diseases of mediastinum, not elsewhere classified (J98.5), disorders of diaphragm (J98.6), other specified respiratory disorders (J98.8) and respiratory disorder, unspecified (J98.9).

Don't report J98.2 together with the conditions in its Excludes1 note: emphysema NOS (J43.9), emphysema in newborn (P25.0), surgical emphysema (subcutaneous) (T81.82) and traumatic subcutaneous emphysema (T79.7).

Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and 1 more.

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 199 (Pneumothorax with MCC, relative weight 1.7322), DRG 200 (Pneumothorax with CC, relative weight 1.0774), DRG 201 (Pneumothorax without CC/MCC, relative weight 0.6782), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 04 (Diseases and Disorders of the Respiratory System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), 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 518.1 (interstitial emphysema).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Mediastinal emphysema
Excludes1Not coded here — never report together with this code
  • emphysema NOS (J43.9)
  • emphysema in newborn (P25.0)
  • surgical emphysema (subcutaneous) (T81.82)
  • traumatic subcutaneous emphysema (T79.7)

Notes that apply from higher levels

Instructions written at a parent level also apply to J98.2.

› From J98 Other respiratory disorders
Excludes1
Excludes2
Use additional code
  • code to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Broader instructions also apply from Chapter 10: Diseases of the respiratory system.

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to J98.2.

Codes whose notes reference J98.2

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.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 518.1Interstitial emphysemaexact

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 J98.2

Is J98.2 billable?

Yes. J98.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can J98.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict J98.2 as a principal diagnosis.

Is J98.2 a CC or MCC?

No. J98.2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does J98.2 group to?

J98.2 is used in the MS-DRG v44.0 logic for MS-DRG 199 (Pneumothorax with MCC), MS-DRG 200 (Pneumothorax with CC), MS-DRG 201 (Pneumothorax without CC/MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). 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 J98.2?

The CMS General Equivalence Mappings map J98.2 to ICD-9-CM 518.1.