J98.5
⚠ Non-billable (Header)Diseases of mediastinum, not elsewhere classified
Diseases of the respiratory system (J00-J99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • newborn apnea (P28.4-)
- • newborn sleep apnea (P28.3-)
⚠️ Excludes2
directBoth codes can exist if both conditions are documented.
- • abscess of mediastinum (J85.3)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • apnea NOS (R06.81)
- • sleep apnea (G47.3-)
📋 Code Instructions
inherited- • code to identify:
- • exposure to environmental tobacco smoke (Z77.22)
- • exposure to tobacco smoke in the perinatal period (P96.81)
- • history of tobacco dependence (Z87.891)
- • occupational exposure to environmental tobacco smoke (Z57.31)
- • tobacco dependence (F17.-)
- • tobacco use (Z72.0)
Clinical Description
ICD-10-CM code J98.5 represents diseases of mediastinum, not elsewhere classified. This code falls under the Diseases of the respiratory system (J00-J99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
This is a 5-character code at the 4th level of specificity. There are 2 more specific child codes under J98.5. Coders should note that J98.5 has 2 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code J98.5?
ICD-10-CM code J98.5 is "Diseases of mediastinum, not elsewhere classified". It belongs to the category: Diseases of the respiratory system (J00-J99).
Is J98.5 a billable ICD-10 code?
No, J98.5 is a non-billable header code. A more specific child code must be used for billing.
What codes are excluded with J98.5?
J98.5 has 2 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can J98.5 be coded with other codes?
J98.5 has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in J98
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)