ICD-10-CM · Chapter 21 · Z00–Z99
Z51.81
Encounter for therapeutic drug level monitoring
Factors influencing health status and contact with health services
Quick facts
- Code
- Z51.81
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 21 — Factors influencing health status and contact with health services
- Category
- Z51 — Encounter for other aftercare and medical care
- Specificity
- 5 characters
How coders use this code
ICD-10-CM Z51.81 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of encounter for therapeutic drug level monitoring. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in Z51
- Z51Encounter for other aftercare and medical care
- Z51.0Encounter for antineoplastic radiation therapy
- Z51.1Encounter for antineoplastic chemotherapy and immunotherapy
- Z51.11Encounter for antineoplastic chemotherapy
- Z51.12Encounter for antineoplastic immunotherapy
- Z51.5Encounter for palliative care
- Z51.6Encounter for desensitization to allergens
- Z51.8Encounter for other specified aftercare
- Z51.89Encounter for other specified aftercare
- Z51.AEncounter for sepsis aftercare
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