ICD-10-CM Code Z51.81
Encounter for therapeutic drug level monitoring
BILLABLE
POA Exempt
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ICD-10 from 2011 - 2016
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.POA Exempt Code
The Center for Medicare & Medicaid Services (CMS) requires medical coders to indicate whether or not a condition was present at the time of admission, in order to properly assign MS-DRG codes. This "Present On Admission" (POA) indicator is recorded on CMS form 4010A.Z51.81 is a billable ICD code used to specify a diagnosis of encounter for therapeutic drug level monitoring. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
POA Indicators on CMS form 4010A are as follows:
| Indicator | Meaning | CMS Will Pay CC/MCC DRG Costs |
|---|---|---|
| Y | Diagnosis was present at time of inpatient admission | Yes |
| N | Diagnosis was not present at time of inpatient admission | No |
| U | Documentation insufficient to determine if the condition was present at the time of inpatient admission. | No |
| W | Clinically undetermined. Provider unable to clinically determine whether the condition was present at the time of inpatient admission. | Yes |
| 1 | Exempt from POA reporting | No |
Coding Notes for Z51.81 Info for medical coders on how to properly use this ICD-10 code
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Code Also Note:
Code Also
A Code Also note indicates that two or more codes may be required to fully describe a condition, but the order of codes is at the coder's discretion. Code order depends on the severity of the conditions and the reason for the encounter. - Any long-term (current) drug therapy See code Z79.-
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Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here." - Encounter for blood-drug test for administrative or medicolegal reasons - instead, use code Z02.83
MS-DRG Mapping
- DRG Group #945-946 - Rehabilitation with CC or MCC.
- DRG Group #945-946 - Rehabilitation without CC or MCC.
- DRG Group #949-950 - Aftercare with CC or MCC.
- DRG Group #949-950 - Aftercare without CC or MCC.
Coding Advice SNOMET-CT
- Consider additional code to identify specific condition or disease
ICD-10-CM Alphabetical Index References for 'Z51.81 - Encounter for therapeutic drug level monitoring'
The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code Z51.81. Click on any term below to browse the alphabetical index.
Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)
Encounter for therapeutic drug monitoring
(exact match)
This is the official exact match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that in all cases where the ICD9 code V58.83 was previously used, Z51.81 is the appropriate modern ICD10 code.
Parent Code: Z51.8 - Encounter for other specified aftercare