2027 ICD-10-CM Diagnosis Code J84.117Desquamative interstitial pneumonia
ICD-10-CM Codes›J00–J99›J80-J84›J84
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 280
- Chronic Condition
J84.117 is a billable ICD-10-CM diagnosis code for desquamative interstitial pneumonia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 196 through 198. 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 90 closely related codes. Coders also document this condition as alveolar macrophage pneumonia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.
For Medicare Advantage risk adjustment, J84.117 maps to CMS-HCC Category 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders) under the V28 model, adding a risk factor of about 0.319 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
J84.117 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Alveolar macrophage pneumonia
- Alveolar macrophage pneumonia caused by cigarette smoke
- Alveolar macrophage pneumonia due to aspiration into lower respiratory tract
- Alveolar macrophage pneumonia due to hereditary disease
- Idiopathic alveolar macrophage pneumonia
- Secondary alveolar macrophage pneumonia
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to J84.117: its own notes plus those printed at J84.11, J84.1, J84, 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.
- pulmonary fibrosis (chronic) following radiation (J70.1)
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)
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)
- if applicable, associated condition
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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name J84.117, its category, or a range that includes it.
Use Additional Code 1
These codes say to use an additional code from the note, and J84.117 is one of the codes named.
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.
Clinical InformationClinical
Desquamative Interstitial Pneumonia
a rare idiopathic interstitial pneumonia characterized by accumulation of macrophages in alveolar spaces and interstitial inflammation. it usually occurs in smokers. some patients develop progressive interstitial lung fibrosis.Idiopathic Interstitial Pneumonias
a group of interstitial lung diseases with no known etiology. there are several entities with varying patterns of inflammation and fibrosis. they are classified by their distinct clinical-radiological-pathological features and prognosis. they include idiopathic pulmonary fibrosis; cryptogenic organizing pneumonia; and others.
Patient EducationClinical
Interstitial Lung Diseases
Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. The inflammation and scarring make it hard to get enough oxygen. The scarring is called pulmonary fibrosis.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert J84.117 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J84.117Overview
What is the ICD-10 code for desquamative interstitial pneumonia?
The ICD-10-CM code for desquamative interstitial pneumonia is J84.117 (sometimes written as J84117). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is J84.117 (Idiopathic interstitial pneumonia) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report desquamative interstitial pneumonia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does J84.117 group to?
When desquamative interstitial pneumonia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 198, 197, 196, with relative weights from 0.7256 to 1.8335 depending on complications. Higher weights mean higher Medicare reimbursement.
Is J84.117 a CC or MCC?
CMS lists J84.117 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 90 closely related codes in its exclusion list.
Can J84.117 be reported with J84.2?
Not as a rule. The Excludes1 note at J84.11, which applies to J84.117, lists "lymphoid interstitial pneumonia (J84.2)". 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 HCC is J84.117?
J84.117 (desquamative interstitial pneumonia) maps to CMS-HCC Category 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders), commonly written as HCC 280, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 112 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 227.
Does J84.117 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, J84.117 adds a risk adjustment factor of about 0.319 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.209 to 0.390 depending on the payment segment). A more severe related category (HCC 276, HCC 277, HCC 278, and HCC 279) supersedes it when both are reported. See the full factor table on the HCC 280 category page.
