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v1.0.0
ICD-10 Guide
DiagnosesThird Trimester Pregnancy

Third Trimester Pregnancy

ICD-10 Coding for Third Trimester Pregnancy(O14.03, O60.1X0)

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

Diagnosis Overview

What is Third Trimester Pregnancy?
Essential facts and insights about Third Trimester Pregnancy

Key Clinical Considerations:

  • Increased fetal movement
  • Braxton Hicks contractions
  • Edema in lower extremities
  • Shortness of breath
  • Back pain

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient's gestational age
  • Presence of any complications (e.g., gestational diabetes, hypertension)
  • Fetal heart rate monitoring results
  • Patient's weight gain and vital signs
  • History of previous pregnancies

Coding Guidelines

Usage Guidelines & Examples

  • Use O09 codes for high-risk pregnancies; avoid using codes for low-risk pregnancies.
  • Common errors include misclassifying the trimester or failing to document complications.

Code Exclusions

Important Exclusions

  • Multiple gestation complications (use O30 codes)
  • Conditions unrelated to pregnancy (e.g., pre-existing hypertension)

Related ICD-10 Codes

Primary Codes
O36.8190
Maternal care for other specified fetal problems, unspecified trimester
O09.52
Supervision of high-risk pregnancy, third trimester
Ancillary Codes
Z3A.32
Z3A.36
Differential Codes
O13.3
O60.0X0

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Obstetrics

Specialty Applications

  • Pregnant patients in the third trimester
  • Obstetric clinics and hospitals

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?

Document gestational age, any complications, and fetal monitoring results.

What are the billing considerations?

Ensure accurate coding based on complications and trimester for proper reimbursement.