ICD-10 Guide

Miscarriage

ICD-10 Coding for Miscarriage(O03.9, O03.4, O02.1)

PRIMARY SPECIALTYObstetrics

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Miscarriage?

Essential facts and insights about Miscarriage

Key Clinical Considerations:

Vaginal bleeding
Abdominal cramping or pain
Loss of pregnancy symptoms (e.g., breast tenderness, nausea)

Clinical Information

Clinical Criteria & Documentation Requirements

Patient history of previous miscarriages
Date of last menstrual period (LMP)
Ultrasound findings confirming fetal demise or absence of fetal heartbeat

Coding Guidelines

Usage Guidelines & Examples

Use O03.9 for unspecified miscarriage; O02.1 for missed abortion.
Common errors include using incorrect codes for incomplete or threatened miscarriage.

Code Exclusions

Important Exclusions

Ectopic pregnancy (O00.x)
Molar pregnancy (O01.x)

Specialty Focus

Primary Specialty

Obstetrics

Specialty Applications

Women of reproductive age
Emergency departments, obstetric clinics, and primary care 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

Documentation requirements?

Include patient history, clinical findings, and any imaging results.

Billing considerations?

Ensure accurate coding to reflect the type of miscarriage for proper reimbursement.

Miscarriage

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

Documentation requirements?

Billing considerations?

Miscarriage

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

Documentation requirements?

Billing considerations?