ICD-10-CM › Z00-Z99 › Z40-Z53 › Z51.8 Encounter for other specified aftercare › Z51.81
Encounter for therapeutic drug level monitoring
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Encounter for therapeutic drug level monitoring
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from Z51 Encounter for other aftercare and medical care
Excludes1 - never coded here
- follow-up examination after treatment (Z08-Z09)
Code also
- condition requiring care
Inherited from the Z40-Z53 section Encounters for other specific health care (Z40-Z53)
Excludes2 - not included here
- follow-up examination for medical surveillance after treatment (Z08-Z09)
Also known as
- Categories Z40-Z53 are intended for use to indicate a reason for care. They may be used for patients who have already been treated for a disease or injury, but who are receiving aftercare or prophylactic care, or care to consolidate the treatment, or to deal with a residual state
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Admission
- Adjustment > implanted device
- Monitoring > therapeutic drug level
- Encounter > therapeutic drug level monitoring
Codes in the same group
| Code | Description | Status |
|---|---|---|
| Z51.89 | Encounter for other specified aftercare | Valid |