F16.21 – Hallucinogen dependence, in remission
ICD-10-CM 2027 diagnosis code · Mental and behavioral disorders due to psychoactive substance use
- Code
F16.21(claims format:F1621)- Description
- Hallucinogen dependence, in remission
- 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
- F16 › F16.2
Notes for F16.21
- Other hallucinogen use disorder, moderate, in early remission
- Other hallucinogen use disorder, moderate, in sustained remission
- Other hallucinogen use disorder, severe, in early remission
- Other hallucinogen use disorder, severe, in sustained remission
- Phencyclidine use disorder, moderate, in early remission
- Phencyclidine use disorder, moderate, in sustained remission
- Phencyclidine use disorder, severe, in early remission
- Phencyclidine use disorder, severe, in sustained remission
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
F16 – Hallucinogen related disorders
- ecstasy
- PCP
- phencyclidine
F16.2 – Hallucinogen dependence
Index terms for F16.21
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in F16.2
- F16.20 – Hallucinogen dependence, uncomplicatedBillable
- F16.22 – Hallucinogen dependence with intoxicationHeader
- F16.24 – Hallucinogen dependence with hallucinogen-induced mood disorderBillable
- F16.25 – Hallucinogen dependence with hallucinogen-induced psychotic disorderHeader
- F16.28 – Hallucinogen dependence with other hallucinogen-induced disorderHeader
- F16.29 – Hallucinogen dependence with unspecified hallucinogen-induced disorderBillable
Frequently asked questions
What is ICD-10 code F16.21?
F16.21 is the ICD-10-CM code for hallucinogen dependence, in remission, in the block F10-F19 (Mental and behavioral disorders due to psychoactive substance use).
Is F16.21 a billable code?
Yes. F16.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does F16.21 belong to?
It belongs to category F16 – Hallucinogen 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.