F18.97 — Inhalant use, unspecified with inhalant-induced persisting dementia

BillableUnspecifiedCC

Is F18.97 billable?

Yes, but F18.97 is an unspecified code. F18.97 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F18.97 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting F18.97 — the more specific alternatives are listed below.

More specific alternatives

F18.97 at a glance

Code	F18.97
Description	Inhalant use, unspecified with inhalant-induced persisting dementia
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does F18.97 group to?

F18.97 sits in MDC 20 and helps define the logic of 4 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

894Alcohol, Drug Abuse or Dependence, Left AMAmedical
895Alcohol, Drug Abuse or Dependence with Rehabilitation Therapymedical
896Alcohol, Drug Abuse or Dependence without Rehabilitation Therapy with MCCmedical
897Alcohol, Drug Abuse or Dependence without Rehabilitation Therapy without MCCmedical

As a secondary diagnosis, F18.97 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is F18.97 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to F18.97. They show the wording a clinician may have documented, which often differs from the Tabular description.

Inhalant-induced › major neurocognitive disorder
Dementia › in › inhalants (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
Dementia › in › volatile solvents (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
Dementia › in › psychoactive drug › inhalants (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
Use › inhalants › with › persisting dementia (of)

Inclusion terms

Alternative wording in documentation that is classified to F18.97.

Inhalant-induced major neurocognitive disorder

Excludes1 — never code together — inherited from F18.9

The conditions below can never be reported together with F18.97 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

inhalant abuse (F18.1-)
inhalant dependence (F18.2-)

Excludes2 — not included here — inherited from Chapter 5

The conditions below are not part of F18.97, but a patient may have both at the same time. When documentation supports it, F18.97 and the excluded code may both be reported.

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

How long has F18.97 existed?

F18.97 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which conditions are coded to F18.97?

ICD-10 code for Dementia