Z16.31
✓ Billable
Resistance to antiparasitic drug(s)
ICD-10-CM · FY2026 · Factors Influencing Health Status
Code
Z16.31
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Factors Influencing Health Status
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Z16.31?
ICD-10-CM code Z16.31 represents Resistance to antiparasitic drug(s). It is a billable diagnosis code in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.
Is Z16.31 billable?
Yes. Z16.31 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is Z16.31 in?
Z16.31 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.
Related codes in the Z16 category
Z16
Resistance to antimicrobial drugs
Non-billable
Z16.1
Resistance to beta lactam antibiotics
Non-billable
Z16.2
Resistance to other antibiotics
Non-billable
Z16.3
Resistance to other antimicrobial drugs
Non-billable
Z16.10
Resistance to unspecified beta lactam antibiotics
Billable
Z16.11
Resistance to penicillins
Billable
Z16.12
Extended spectrum beta lactamase (ESBL) resistance
Billable
Z16.13
Resistance to carbapenem
Billable
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