ICD-10 Guide

Abnormal Menstruation

ICD-10 Coding for Abnormal Menstruation(N92.6, N92.1)

PRIMARY SPECIALTYGynecology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Abnormal Menstruation?

Abnormal menstruation refers to any deviation from the normal menstrual cycle, including irregular, heavy, or prolonged bleeding. Key clinical points include: 1) It can be caused by hormonal imbalances, uterine abnormalities, or systemic conditions. 2) Symptoms may include heavy menstrual bleeding (menorrhagia), infrequent menstruation (oligomenorrhea), or prolonged bleeding. 3) Diagnosis often involves a thorough patient history, physical examination, and possibly imaging studies or laboratory tests. Typical use cases for this diagnosis code include patients presenting with complaints of irregular periods, excessive bleeding, or menstrual pain. Etiology can range from polycystic ovary syndrome (PCOS) to fibroids or endometrial hyperplasia. Pathophysiology often involves disruptions in the hypothalamic-pituitary-ovarian axis, leading to abnormal hormone levels. Clinical presentation may vary widely, necessitating individualized assessment and management.

Key Clinical Considerations:

Diagnosis requires a documented history of menstrual irregularities over at least three cycles.
Signs include variations in cycle length, volume of menstrual flow, and duration of bleeding.
Resolution criteria may include normalization of menstrual cycles after treatment or lifestyle changes.
Laboratory findings may include hormonal assays, and imaging may reveal structural abnormalities like fibroids.

Clinical Information

Clinical Criteria & Documentation Requirements

Documentation must include specific details about menstrual cycle patterns, associated symptoms, and any relevant medical history.
Compliant documentation: 'Patient reports heavy menstrual bleeding for the past 6 months.' Non-compliant: 'Patient has problems with periods.'
Template phrases: 'Patient's menstrual cycle is irregular with episodes of menorrhagia.'
Medical necessity documentation should justify the need for diagnostic tests or treatments based on clinical findings.

Coding Guidelines

Usage Guidelines & Examples

Use N92.6 for heavy menstrual bleeding not due to an underlying condition; use N92.1 for irregular menstruation due to hormonal issues.
Do not use these codes for menstrual irregularities due to pregnancy or menopause.
Correct usage: 'Patient diagnosed with N92.6 due to heavy bleeding.' Incorrect: 'Patient has irregular periods without further specification.'
Common errors include using the code without specifying the type of abnormality; ensure detailed documentation.

Code Exclusions

Important Exclusions

Excluded conditions include pregnancy-related bleeding and menopause, as these are not classified under abnormal menstruation.
Alternative codes for exclusions may include O20 for pregnancy-related bleeding.
Common exclusion errors include misclassifying menopausal symptoms as abnormal menstruation; ensure accurate patient history.
Certain conditions are excluded to maintain specificity and avoid misdiagnosis.

Specialty Focus

Primary Specialty

Gynecology

Specialty Applications

This diagnosis applies to conditions like menorrhagia, oligomenorrhea, and dysmenorrhea.
Appropriate in clinical scenarios where patients report menstrual irregularities or excessive bleeding.
Applicable in outpatient settings for routine gynecological evaluations, as well as inpatient settings for surgical interventions.
Specialty-specific considerations include the need for gynecological evaluation and possible referral to endocrinology for hormonal assessments.

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

Template 1

Template: 'Abnormal menstruation diagnosed based on patient history and clinical findings.'

Template 2

Template: 'Patient presents with heavy menstrual bleeding consistent with N92.6.'

Template 3

Template: 'Diagnostic criteria met: irregular cycles with heavy flow.'

Template 4

Template: 'Treatment plan includes hormonal therapy for abnormal menstruation.'

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 documentation is required for this code?

Detailed documentation of menstrual history, symptoms, and any diagnostic tests performed.

When should this code be used vs similar codes?

Use N92.6 for excessive bleeding and N92.1 for irregular cycles; differentiate based on clinical presentation.

What are common billing issues with this code?

Reimbursement may be denied if documentation lacks specificity; ensure clear clinical rationale.

What procedures are commonly associated?

Related CPT codes may include pelvic ultrasound or endometrial biopsy, depending on clinical findings.

What is Abnormal Menstruation?

Key Clinical Considerations:

Diagnosis requires a documented history of menstrual irregularities over at least three cycles.
Signs include variations in cycle length, volume of menstrual flow, and duration of bleeding.
Resolution criteria may include normalization of menstrual cycles after treatment or lifestyle changes.
Laboratory findings may include hormonal assays, and imaging may reveal structural abnormalities like fibroids.

Abnormal Menstruation

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

Template 1

Template 2

Template 3

Template 4

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What documentation is required for this code?

When should this code be used vs similar codes?

What are common billing issues with this code?

What procedures are commonly associated?

Abnormal Menstruation

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

Template 1

Template 2

Template 3

Template 4

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What documentation is required for this code?

When should this code be used vs similar codes?

What are common billing issues with this code?

What procedures are commonly associated?