J91Header code — not billable
Pleural effusion in conditions classified elsewhere
- Chapter
- 10. Diseases of the respiratory system
- Category
- J91
- Effective date
- October 1, 2026
Related codes in category J91
Frequently asked questions
What is ICD-10 code J91?
J91 is an ICD-10-CM diagnosis code for Pleural effusion in conditions classified elsewhere.
Is J91 a billable code?
No. J91 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is J91 in?
J91 falls under Chapter 10: Diseases of the respiratory system.
When did J91 become effective?
J91 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to J91?
J91 belongs to category J91, which includes 2 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.