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ICD-10-CM Current in FY 2027

Z51.81

Encounter for therapeutic drug level monitoring

Release
FY 2027
Effective
Official source (opens in a new tab)

Hierarchy

Where Z51.81 sits in the official hierarchy. Each level is the code it is classified under.

  1. Z51 Encounter for other aftercare and medical care
  2. Z51.8 Parent Encounter for other specified aftercare
  3. Z51.81 This code Encounter for therapeutic drug level monitoring

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Excludes1

holiday relief care ( Z75.5 )

Inherited from Z51.8 — Encounter for other specified aftercare

Excludes1

encounter for blood-drug test for administrative or medicolegal reasons ( Z02.83 )

Excludes1

follow-up examination after treatment (Z08-Z09)

Inherited from Z51 — Encounter for other aftercare and medical care

Code Also

any long-term (current) drug therapy ( Z79 .-)

Code Also

condition requiring care

Inherited from Z51 — Encounter for other aftercare and medical care

Version History

How Z51.81 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Encounter for therapeutic drug level monitoring

  2. FY 2026 Effective

    Unchanged

    Encounter for therapeutic drug level monitoring

Related Codes

Other codes under Z51.8

Codes whose official notes reference Z51.81

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release
FY 2027
Effective
Source file
icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

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