F18.121 – Inhalant abuse with intoxication delirium

ICD-10-CM 2027 diagnosis code · Mental and behavioral disorders due to psychoactive substance use

Billable code

ICD-10-CM code F18.121

Code: F18.121 (claims format: F18121)
Description: Inhalant abuse with intoxication delirium
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: F10-F19 Mental and behavioral disorders due to psychoactive substance use
Parent codes: F18 › F18.1 › F18.12

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

F18 – Inhalant related disorders

Includes:

volatile solvents

F18.1 – Inhalant abuse

Excludes1 (not coded here):

inhalant dependence (F18.2-)
inhalant use, unspecified (F18.9-)

Index terms for F18.121

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in F18.12

Frequently asked questions

What is ICD-10 code F18.121?

F18.121 is the ICD-10-CM code for inhalant abuse with intoxication delirium, in the block F10-F19 (Mental and behavioral disorders due to psychoactive substance use).

Is F18.121 a billable code?

Yes. F18.121 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does F18.121 belong to?

It belongs to category F18 – Inhalant related disorders.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.