F16.988 — Hallucinogen use, unspecified with other hallucinogen-induced disorder
Is F16.988 billable?
Yes, but F16.988 is an unspecified code. F16.988 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F16.988 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 F16.988 — the more specific alternatives are listed below.
F16.988 at a glance
| Code | F16.988 |
|---|---|
| Description | Hallucinogen use, unspecified with other hallucinogen-induced disorder |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F16.988 group to?
F16.988 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 F16.988 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F16.988. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Use › hallucinogen NEC › with › other specified disorder (of)
Excludes1 — never code together — inherited from F16.9
The conditions below can never be reported together with F16.988 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F16.988, but a patient may have both at the same time. When documentation supports it, F16.988 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
How long has F16.988 existed?
F16.988 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.