Billable / Specific Code
ICD-10-CM Z16.20 is the diagnosis code for Resistance to unspecified antibiotic. This code falls under the section "Resistance to antimicrobial drugs" within Chapter 21 — Factors influencing health status and contact with health services (Z00-Z99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where Z16.20 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, Z16.20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Z16.20 is the ICD-10-CM diagnosis code for "Resistance to unspecified antibiotic". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Z16.20 is Z16.2 ("Resistance to other antibiotics"). Z16.20 provides a more specific classification within this category.
Z16.20 is located in Section Z16 — "Resistance to antimicrobial drugs" within Chapter 21 of the ICD-10-CM Tabular List.
Use Z16.20 when the patients documented diagnosis matches "Resistance to unspecified antibiotic" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Resistance to unspecified antibiotic is Z16.20.
Yes, Z16.20 can be used as a primary diagnosis code since it is billable and specific.
Z16.20 is in Chapter 21 of the ICD-10-CM Tabular List.
Yes, Z16.20 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.