ICD-10 Guide

Preop Lab

ICD-10 Coding for Preoperative Laboratory Evaluation(Z01.812)

PRIMARY SPECIALTYGeneral Surgery

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Preop Lab?

Essential facts and insights about Preoperative Laboratory Evaluation

Key Clinical Considerations:

Patient history and physical examination indicating need for surgery
Laboratory tests including CBC, BMP, and coagulation studies
Vital signs and any abnormal findings during preoperative assessment

Clinical Information

Clinical Criteria & Documentation Requirements

Complete patient history including comorbidities
Results of preoperative lab tests and their interpretations
Clear indication of surgical procedure planned

Coding Guidelines

Usage Guidelines & Examples

Follow guidelines for preoperative assessments to avoid denials.
Common errors include missing lab results or incomplete patient history.

Code Exclusions

Important Exclusions

Patients with active infections requiring immediate surgery
Codes for postoperative complications or unrelated conditions

Specialty Focus

Primary Specialty

General Surgery

Specialty Applications

Adult and pediatric patients undergoing surgery
Outpatient and inpatient surgical settings

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

What are the documentation requirements?

Documentation must include patient history, physical exam findings, and lab results.

What are the billing considerations?

Ensure all preoperative tests are medically necessary and properly documented to support billing.

Preop Lab

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What are the documentation requirements?

What are the billing considerations?

Preop Lab

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What are the documentation requirements?

What are the billing considerations?