F19.99 — Other psychoactive substance use, unspecified with unspecified psychoactive substance-induced disorder

BillableUnspecified

Is F19.99 billable?

Yes, but F19.99 is an unspecified code. F19.99 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F19.99 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 F19.99 — the more specific alternatives are listed below.

More specific alternatives

F19.99 at a glance

Code	F19.99
Description	Other psychoactive substance use, unspecified with unspecified psychoactive substance-induced disorder
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does F19.99 group to?

F19.99 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

How is F19.99 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to F19.99. They show the wording a clinician may have documented, which often differs from the Tabular description.

Misuse of drugs
Disorder › drug related (of)
Use › psychoactive drug NEC › with › unspecified disorder (of)

Excludes1 — never code together — inherited from F19.9

The conditions below can never be reported together with F19.99 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

other psychoactive substance abuse (F19.1-)
other psychoactive substance dependence (F19.2-)

Excludes2 — not included here — inherited from Chapter 5

The conditions below are not part of F19.99, but a patient may have both at the same time. When documentation supports it, F19.99 and the excluded code may both be reported.

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

How long has F19.99 existed?

F19.99 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.