J84.03
Idiopathic pulmonary hemosiderosis
J84.03 (also written J8403) is a billable ICD-10-CM diagnosis code for idiopathic pulmonary hemosiderosis. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 24 codes in category J84 (Other interstitial pulmonary diseases). The Alphabetic Index lists it under 2 entries. Its coding notes include a Code first instruction, a Use additional code instruction, a Code also instruction, 3 Excludes1 entries and 10 Excludes2 entries.
Code first
If the underlying condition listed here is present and known, sequence it first.
- underlying disease, such as:
- disorders of iron metabolism (E83.1-)
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (7 notes)
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
- , if applicable, associated condition
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- acute idiopathic pulmonary hemorrhage in infants [AIPHI] (R04.81)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
- lung diseases due to external agents (J60-J70)
Also from chapter/block level (9 notes)
- 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)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Hospice: not accepted as primary
Not accepted as the principal diagnosis on a hospice claim (bill types 081x and 082x). The Integrated OCE returns an edit for this code.
Reason: Manifestation code. Report the underlying condition first (see the Code first note).
Hospital CC
Counts as a complication or comorbidity (CC) when reported as a secondary diagnosis on an inpatient claim. It does not count when the principal diagnosis is one of the 90 codes in its exclusion list. Some MS-DRGs also ignore a CC or MCC that defines the DRG.
Source: CMS MS-DRG Definitions Manual v44, effective October 1, 2026, Appendix CInclusion terms
Conditions classified to this code.
- Essential brown induration of lung
Notes
Also from chapter/block level (1 note)
- 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).
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 2 entries