ICD-10-CM 2027
ICD-10 code for Siderosis
From the official ICD-10-CM alphabetic index entry “Siderosis (lung)”. Page updated September 29, 2026.
About coding Siderosis
The ICD-10-CM code for Siderosis is J63.4 (Siderosis). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on J63.4.
Within J63 (pneumoconiosis due to other inorganic dusts), J63.4 is specifically for Siderosis. Related codes cover Aluminosis (of lung) (J63.0), Bauxite fibrosis (of lung) (J63.1), Berylliosis (J63.2), Graphite fibrosis (of lung) (J63.3), Stannosis (J63.5) and pneumoconiosis due to other specified inorganic dusts (J63.6).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 196 (Interstitial Lung Disease with MCC, relative weight 1.8336), DRG 197 (Interstitial Lung Disease with CC, relative weight 0.9492) and DRG 198 (Interstitial Lung Disease without CC/MCC, relative weight 0.7259), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Siderosis codes (official index)
- brain G93.89 — Other specified disorders of brain
- eye (globe)
Common questions about Siderosis ICD-10 codes
What is the ICD-10 code for Siderosis?
- J63.4 — Siderosis. More specific codes apply when the documentation supports them: G93.89.
What is the ICD-10 code for brain siderosis?
- G93.89 — Other specified disorders of brain.
Is J63.4 billable?
- Yes. J63.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J63.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J63.4 as a principal diagnosis.
Is J63.4 a CC or MCC?
- No. J63.4 is neither a CC nor an MCC under MS-DRG v44.0.