The ICD-10 section that covers long-term drug therapy is Z79, with many subsections and specific diagnosis codes.
2022 ICD-10-CM Diagnosis Code Z79. 899: Other long term (current) drug therapy.
Persons encountering health services in other specified circumstancesZ76. 89 is a valid ICD-10-CM diagnosis code meaning 'Persons encountering health services in other specified circumstances'.
899 or Z79. 891 depending on the patient's medication regimen. That said, it was always a supporting diagnosis, never primary.
For the monitoring of patients on methadone maintenance and chronic pain patients with opioid dependence use diagnosis code Z79. 891, suspected of abusing other illicit drugs, use diagnosis code Z79. 899.
If the type 2 diabetic patient uses insulin or oral hypoglycemic medication, the medications can be coded as Z79. 4 or Z79. 84, respectively. If the diabetic patient takes both oral medication and insulin, it is only necessary to code the insulin usage.
ICD-10 code Z51. 81 for Encounter for therapeutic drug level monitoring is a medical classification as listed by WHO under the range - Factors influencing health status and contact with health services .
89 – persons encountering health serviced in other specified circumstances” as the primary DX for new patients, he is using the new patient CPT.
ICD-Code I10 is a billable ICD-10 code used for healthcare diagnosis reimbursement of Essential (Primary) Hypertension. Its corresponding ICD-9 code is 401.
ICD-10-PCS GZ3ZZZZ is a specific/billable code that can be used to indicate a procedure.
V58. 69 - Long-term (current) use of other medications. ICD-10-CM.
Encounter for therapeutic drug level monitoring. Z51. 81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.