2027 ICD-10-CM Diagnosis Code J98.4Other disorders of lung

ICD-10-CM Codes›J00–J99›J96-J99›J98

ICD-10-CM J98.4
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

J98.4 is a billable ICD-10-CM diagnosis code for other disorders of lung. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 205 through 206. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.

Code Identity

ICD-10-CM Code
J98.4
Billable Status
Yes — Valid for Submission
Code Describes
Other disorders of lung
Short Description
Other disorders of lung
Same as the full description in the CMS dataset.
Parent Code
J98
Other respiratory disorders

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ96-J99Other diseases of the respiratory system
CategoryJ98Other respiratory disorders
This CodeJ98.4Other disorders of lung

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired bronchogenic cyst
  • Bulla of lung
  • Calcification of lung
  • Cavitation of lung
  • Chronic cavitary pulmonary aspergillosis
  • Chronic lung disease
  • Chronic lung disease due to surfactant disorder
  • Chronic pulmonary aspergillosis
  • Cystic-bullous disease of the lung
  • Diffuse pulmonary calcinosis
  • Discoloration of lung
  • Disorder of lung
  • Disorder of lung due to immunoglobulin A vasculitis
  • Erythrocytosis due to pulmonary disease
  • Erythrocytosis due to tissue hypoxemia
  • FEV1/FVC ratio abnormal
  • Hemosiderosis
  • Idiopathic diffuse pulmonary ossification
  • Imaging of lung abnormal
  • Infected bronchogenic cyst
  • Infection by Pneumocystis jirovecii
  • Infection of lung caused by Pneumocystis jirovecii
  • Lung cyst
  • Lung disorder due to autoimmune disorder
  • Lung function mildly obstructed
  • Lymphocytic pseudotumor of lung
  • Micronodular pulmonary ossification
  • Milk-induced pulmonary disease in infant
  • Multiple lung cysts
  • Multiple nodules of lung
  • Non-smoker's second hand smoke syndrome
  • Occupational lung disease
  • Pneumocystis jirovecii lung cyst
  • Pulmolithiasis
  • Pulmonary aspergillosis
  • Pulmonary cavity following infection by Coccidioides
  • Pulmonary hyalinizing granuloma
  • Pulmonary hypertension due to lung disease and/or hypoxia
  • Pulmonary nodular lymphoid hyperplasia
  • Pulmonary ossification
  • Pulmonary toxicity
  • Restrictive lung disease
  • Restrictive lung disease due to kyphoscoliosis
  • Restrictive lung disease due to muscular dystrophy
  • Right ventricular failure due to pulmonary disease
  • Right ventricular failure due to pulmonary vascular disease
  • Secondary hemosiderosis
  • Secondary pulmonary hemosiderosis
  • Squamous metaplasia of lung
  • Swyer James MacLeod syndrome
  • Uremic lung

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to J98.4: its own notes plus those printed at J98 and Chapter 10. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Calcification of lung
  • Cystic lung disease (acquired)
  • Lung disease NOS
  • Pulmolithiasis

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On J98.4 itself
  • acute interstitial pneumonitis (J84.114)
  • pulmonary insufficiency following surgery (J95.1-J95.2)
From J98 Other respiratory disorders applies to 12 codes

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From J98 Other respiratory disorders applies to 12 codes
From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • smoke inhalation (T59.81-)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From J98 Other respiratory disorders applies to 12 codes
  • 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)
From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • code, where applicable, 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)

Notes

General instructions on how these codes are used.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name J98.4, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming J98.4: they are not reported together with it, unless the two conditions are unrelated.

  • Q33.0 Congenital cystic lung
    cystic lung disease, acquired or unspecified (J98.4)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR RSP016
Other specified and unspecified lower respiratory disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Lung Diseases

When you breathe, your lungs take in oxygen from the air and deliver it to the bloodstream. The cells in your body need oxygen to work and grow. During a normal day, you breathe nearly 25,000 times. People with lung disease have difficulty breathing. Millions of people in the U.S. have lung disease.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert J98.4 to ICD-9-CMHistory

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

ICD-9-CM
518.89 Other lung disease NEC
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 J98.4Overview

What is the ICD-10 code for other disorders of lung?

The ICD-10-CM code for other disorders of lung is J98.4 (sometimes written as J984). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is J98.4 (Other respiratory disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other disorders of lung on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does J98.4 group to?

When other disorders of lung is the principal diagnosis on an inpatient stay, it groups to MS-DRG 206, 205, with relative weights from 0.9255 to 1.8244 depending on complications. Higher weights mean higher Medicare reimbursement.

Can J98.4 be reported with J84.114?

Not as a rule. The Excludes1 note on J98.4 lists "acute interstitial pneumonitis (J84.114)". 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).

Does J98.4 need an additional code?

When the condition applies, yes. The Use Additional Code note at J98, which applies to J98.4, reads: 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 listed in the Instructional Notes section. The additional code is reported after J98.4.