Z91.138
BillablePatient's unintentional underdosing of medication regimen for other reason
Z91.138 is the ICD-10-CM code for Patient's unintentional underdosing of medication regimen for other reason. It is a billable, specific code valid for reimbursement.
Z00-Z99 Factors influencing health status and contact with health services
What this means — in plain language
MedlinePlus · NIHMedicines treat infectious diseases, prevent problems from chronic diseases, and ease pain. But medicines can also cause harmful reactions if not used correctly. Errors can happen in the hospital, at the health care provider's office, at the pharmacy, or at home. You can help prevent errors by: Knowing your medicines. When you get a prescription, ask the name of the medicine and check to make sure that the pharmacy…
Read more about Medication Errors at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
- What is ICD-10 code Z91.138?
- Z91.138 is the ICD-10-CM code for "Patient's unintentional underdosing of medication regimen for other reason". It falls under Z00-Z99 Factors influencing health status and contact with health services.
- Is Z91.138 a billable code?
- Yes — Z91.138 is a billable, specific ICD-10-CM code valid for reimbursement.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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