Is J91 a billable ICD-10-CM code?

No. J91 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does J91 sit in the tabular list?

Diseases of the respiratory system (J00-J99), in the block Other diseases of the pleura (J90-J94).

J91

J91 — Pleural effusion in conditions classified elsewhere

Non-billable headerICD-10-CM

J91 is a non-billable header ICD-10-CM code for pleural effusion in conditions classified elsewhere. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

pleural effusion in heart failure (I50.-)
pleural effusion in systemic lupus erythematosus (M32.13)

Other codes that can never be billed with J91

These codes carry an Excludes1 note pointing at J91. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading J91 alone.

J90Pleural effusion, not elsewhere classified

Risk adjustment

J91 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead J91

2 child codes. Green means billable.

Questions about J91

Is J91 a billable ICD-10-CM code?: No. J91 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does J91 sit in the tabular list?: Diseases of the respiratory system (J00-J99), in the block Other diseases of the pleura (J90-J94).