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v1.0.0
ICD-10 Guide
DiagnosesVanco Trough

Vanco Trough

ICD-10 Coding for Vancomycin Trough Monitoring(Z51.81, B95.61, T80.6)

PRIMARY SPECIALTYInfectious Disease
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Vanco Trough?
Essential facts and insights about Vancomycin Trough Monitoring

Key Clinical Considerations:

  • Elevated serum vancomycin levels indicating potential toxicity or inadequate dosing
  • Trough levels measured before the next dose, ideally 30 minutes prior
  • Signs of nephrotoxicity such as increased creatinine levels or oliguria

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient's medication history and current vancomycin regimen
  • Date and time of trough level measurement
  • Clinical rationale for monitoring vancomycin levels

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for appropriate coding of vancomycin-related conditions.
  • Common errors include incorrect coding of adverse effects or failing to document monitoring.

Code Exclusions

Important Exclusions

  • Patients with known allergies to vancomycin
  • Alternative codes for other antibiotic therapies

Related ICD-10 Codes

Primary Codes
T36.0X5A
Poisoning by vancomycin, accidental (unintentional), initial encounter
Z79.2
Long term (current) use of antibiotics
Ancillary Codes
Z51.81
B95.61
to document drug monitoring.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Infectious Disease

Specialty Applications

  • Patients receiving vancomycin for infections such as MRSA
  • Inpatient and outpatient clinical settings where vancomycin is prescribed

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

Documentation requirements?

Include patient's clinical status, vancomycin dosing schedule, and lab results.

Billing considerations?

Ensure accurate coding of the diagnosis and monitoring services to avoid denials.