What is the ICD-10 code for pleural effusion?

The ICD-10-CM code for pleural effusion is J90 when documented without further specification. More specific documentation changes the code — see the scenario table.

Yes — J90 is a billable ICD-10-CM code, but payers expect the most specific code the documentation supports.

ICD-10 Code for pleural effusion

The ICD-10-CM code for pleural effusion is J90 when documented without further specification. J90 is pleural effusion not elsewhere classified - the default when no more-specific cause is documented. Specific effusions are coded elsewhere: malignant (J91.0), chylous (J94.0), and tuberculous (A15.6). Pleurisy without effusion is R09.1. These are Excludes1 from J90.

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Symptom code vs. confirmed diagnosis

Pleural effusion is a diagnosis/finding; J90 applies only when a more specific effusion is not documented. Malignant (J91.0), chylous (J94.0), and tuberculous (A15.6) effusions, and pleurisy NOS (R09.1), are excluded and coded to their own codes.

Which Code Should You Use?

J90 ✓ Billable — Pleural effusion, not elsewhere classified

Pleural effusion, not elsewhere classified.

J91.0 ✓ Billable — Malignant pleural effusion

Malignant pleural effusion (documented malignant cause).

J94.0 ✓ Billable — Chylous effusion

Chylous (pleural) effusion.

A15.6 ✓ Billable — Tuberculous pleurisy

Tuberculous pleural effusion.

R09.1 ✓ Billable — Pleurisy

Pleurisy (pleurisy without a documented effusion).

What to Document

Cause of the effusion - malignant (J91.0), chylous (J94.0), or tuberculous (A15.6) effusions are coded to their own codes, not J90.
The underlying condition (e.g., heart failure, pneumonia) driving the effusion, coded when documented.
Pleural effusion versus pleurisy without effusion (R09.1).

Common Documentation Pitfalls

J90 excludes malignant (J91.0), chylous (J94.0), and tuberculous (A15.6) effusions (Excludes1) - code those to their specific codes.
Pleurisy NOS is R09.1, not J90 (Excludes1) - J90 requires a documented effusion.

Instructional Notes for J90

Excludes1

Not coded here. These conditions should NOT be coded together with J90.

chylous (pleural) effusion (J94.0)
malignant pleural effusion (J91.0))
pleurisy NOS (R09.1)
tuberculous pleural effusion (A15.6)

Also Known As

Official ICD-10-CM Alphabetic Index terms that point to J90:

Pleurisy (acute) (adhesive) (chronic) (costal) (diaphragmatic) (double) (dry) (fibrinous) (fibrous) (interlobar) (latent) (plastic) (primary) (residual) (sicca) (sterile) (subacute) (unresolved) › pneumococcal
Pleurisy (acute) (adhesive) (chronic) (costal) (diaphragmatic) (double) (dry) (fibrinous) (fibrous) (interlobar) (latent) (plastic) (primary) (residual) (sicca) (sterile) (subacute) (unresolved) › streptococcal
Effusion › pleura, pleurisy, pleuritic, pleuropericardial
Pleurisy (acute) (adhesive) (chronic) (costal) (diaphragmatic) (double) (dry) (fibrinous) (fibrous) (interlobar) (latent) (plastic) (primary) (residual) (sicca) (sterile) (subacute) (unresolved) › with › effusion

Coding Notes

J90 is pleural effusion NEC, the default when a specific effusion type is not documented. Its Excludes1 sends malignant effusion to J91.0, chylous to J94.0, tuberculous to A15.6, and pleurisy NOS to R09.1. Code the underlying condition when documented. J90 has no billable subcodes.