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ICD-10 Guide
DiagnosesThickening Of The Endometrium

Thickening Of The Endometrium

ICD-10 Coding for Thickening of the Endometrium(R93.89, N85.00)

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

Diagnosis Overview

What is Thickening Of The Endometrium?
Essential facts and insights about Thickening of the Endometrium

Key Clinical Considerations:

  • Abnormal uterine bleeding
  • Pelvic pain or discomfort
  • Menstrual irregularities

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of menstrual cycles
  • Results from transvaginal ultrasound or hysteroscopy
  • Pathology reports if biopsy performed

Coding Guidelines

Usage Guidelines & Examples

  • Use N85.0 for unspecified hyperplasia; N85.1 for atypical hyperplasia.
  • Common errors include using incorrect codes for benign conditions.

Code Exclusions

Important Exclusions

  • Endometrial carcinoma
  • Other uterine pathologies such as fibroids

Related ICD-10 Codes

Primary Codes
N85.0
Endometrial hyperplasia, unspecified
N85.1
Endometrial hyperplasia, atypical
Ancillary Codes
Z01.818
Differential Codes
N85.00
R93.89

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Gynecology

Specialty Applications

  • Women of reproductive age experiencing abnormal bleeding
  • Gynecological 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 patient symptoms, diagnostic tests, and any treatments provided.

What are the billing considerations?

Ensure accurate coding based on the diagnosis and any procedures performed.