2027 ICD-10-CM Diagnosis Code J98.11Atelectasis
ICD-10-CM Codes›J00–J99›J96-J99›J98
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
J98.11 is a billable ICD-10-CM diagnosis code for atelectasis. 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, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 10 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pleurisy, pleural effusion and pulmonary collapse.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute atelectasis
- Atelectasis
- Atelectasis AND/OR obstructive pneumonitis of entire lung associated with direct extension of malignant neoplasm
- Chronic atelectasis
- Collapse of lung present
- Complete atelectasis
- Complete atelectasis of left lung
- Complete atelectasis of right lung
- Complications of anesthesia during labor and delivery
- Compression atelectasis
- Focal atelectasis
- Linear atelectasis
- Middle lobe syndrome
- Obstetric anesthesia with pulmonary complications
- Obstructive atelectasis
- Postoperative atelectasis
- Pressure collapse of lung due to anesthesia during labor and delivery
- Pressure collapse of lung due to anesthesia in puerperium
- Round atelectasis
- Traumatic atelectasis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to J98.11: its own notes plus those printed at J98.1, J98, and Chapter 10. 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.
- newborn atelectasis
- tuberculous atelectasis (current disease) (A15)
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.
- 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)
Notes
General instructions on how these codes are used.
- 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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Right middle lobe syndrome J98.11
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Pulmonary Atelectasis
absence of air in the entire or part of a lung, such as an incompletely inflated neonate lung or a collapsed adult lung. pulmonary atelectasis can be caused by airway obstruction, lung compression, fibrotic contraction, or other factors.
Patient EducationClinical
Collapsed Lung
A collapsed lung happens when air enters the pleural space, the area between the lung and the chest wall. If it is a total collapse, it is called pneumothorax. If only part of the lung is affected, it is called atelectasis.
Read the full article at MedlinePlus
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Convert J98.11 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J98.11Overview
What is the ICD-10 code for atelectasis?
The ICD-10-CM code for atelectasis is J98.11 (sometimes written as J9811). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is J98.11 (Pulmonary collapse) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report atelectasis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does J98.11 group to?
When atelectasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 206, 205, with relative weights from 0.9255 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is J98.11 a CC or MCC?
CMS lists J98.11 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 10 closely related codes in its exclusion list.
Can J98.11 be reported with A15?
Not as a rule. The Excludes1 note on J98.11 lists "tuberculous atelectasis (current disease) (A15)". 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).
