U.S. ICD-10-CM · FY 2027

J98.5 ICD-10-CM Code: Diseases of mediastinum, not elsewhere classified

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

J98.5

Diseases of mediastinum, not elsewhere classified

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where J98.5 sits

  1. 1

    Chapter 10

    Diseases of the respiratory system (J00-J99)

  2. 2

    Section

    Other diseases of the respiratory system (J96-J99)

  3. 3

    Category J98

    Other respiratory disorders

  4. 4

    Code J98.5

    Diseases of mediastinum, not elsewhere classified

More specific choices

Codes under J98.5

J98.5 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for J98.5.

Code first

No “code first” instruction is listed for J98.5.

Use additional code

No “use additional code” instruction is listed for J98.5.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for J98.5.

Excludes2

Conditions not included here that may be reported separately when present.

  • abscess of mediastinum (J85.3)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code J98.5 mean?

J98.5 is the FY 2027 U.S. ICD-10-CM code for “Diseases of mediastinum, not elsewhere classified.”

Is J98.5 a billable or specific ICD-10-CM code?

No. J98.5 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is J98.5 located in ICD-10-CM?

J98.5 is listed in Chapter 10, Diseases of the respiratory system (J00-J99), within Other diseases of the respiratory system (J96-J99) (J96–J99), under category J98, Other respiratory disorders.

What coding notes are listed for J98.5?

No inclusion terms are listed for J98.5 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: abscess of mediastinum (J85.3).

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