2026 ICD-10-CM Diagnosis Code J84.03Idiopathic pulmonary hemosiderosis
ICD-10-CM Codes›J00–J99›J80-J84›J84
- Billable — Valid for Submission
- Chronic Condition
J84.03 is a billable ICD-10-CM diagnosis code for idiopathic pulmonary hemosiderosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 196 through 198. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as hemosiderosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for J84.03.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Hemosiderosis
- Idiopathic pulmonary hemosiderosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Essential brown induration of lung
Code First
- underlying disease, such as:
- disorders of iron metabolism E83.1
Type 1 Excludes
- acute idiopathic pulmonary hemorrhage in infants AIPHI R04.81
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- lung (black) (chronic) (fibroid) - See Also: Fibrosis, lung; - J84.10
- essential brown - J84.03
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Induration, indurated
- lung (black) (chronic) (fibroid)
- essential brown
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Hemosiderosis
conditions in which there is a generalized increase in the iron stores of body tissues, particularly of liver and the mononuclear phagocyte system, without demonstrable tissue damage. the name refers to the presence of stainable iron in the tissue in the form of hemosiderin.Hemosiderosis, Pulmonary
iron deposition within the lung. primary pulmonary hemosiderosis is characterized by hemoptysis; iron-deficiency anemia, and diffuse pulmonary hemorrhage as seen as transient pulmonary infiltrates on radiography. even though large amounts of iron are laid down in the lung, with normal or increased total body iron, anemia occurs because of inability of the erythron to use iron sequestered in pulmonary macrophages.Mononuclear Phagocyte System
mononuclear cells with pronounced phagocytic ability that are distributed extensively in lymphoid and other organs. it includes macrophages and their precursors; phagocytes; kupffer cells; histiocytes; dendritic cells; langerhans cells; and microglia. the term mononuclear phagocyte system has replaced the former reticuloendothelial system, which also included less active phagocytic cells such as fibroblasts and endothelial cells. (from illustrated dictionary of immunology, 2d ed.)
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
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Convert J84.03 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J84.03Overview
Is J84.03 (Alveolar and parieto-alveolar conditions) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report idiopathic pulmonary hemosiderosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does J84.03 group to?
On inpatient claims, idiopathic pulmonary hemosiderosis maps to MS-DRG 196, 197, 198, with relative weights from 0.7162 to 1.8872 depending on complications. Higher weights mean higher Medicare reimbursement.
Can J84.03 be a principal diagnosis?
No. This is a manifestation code: idiopathic pulmonary hemosiderosis describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of J84.03?
Under the General Equivalence Mappings, idiopathic pulmonary hemosiderosis converts to ICD-9-CM 516.1 (idio pulm hemosiderosis). The mapping is a direct match.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
