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ICD-10 Guide
DiagnosesAdenomyosis

Adenomyosis

ICD-10 Coding for Adenomyosis(N80.03)

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

Diagnosis Overview

What is Adenomyosis?
Essential facts and insights about Adenomyosis

Key Clinical Considerations:

  • Pelvic pain, particularly during menstruation (dysmenorrhea) or intercourse (dyspareunia)
  • Heavy menstrual bleeding (menorrhagia) or irregular bleeding patterns
  • Laboratory findings may include elevated levels of prostaglandins or inflammatory markers
  • Physical examination may reveal tenderness in the pelvic region or enlarged uterus
  • Imaging findings may include an enlarged uterus on ultrasound or MRI, with possible adenomyoma formation
  • Severity criteria may include the impact on quality of life and the degree of pain experienced

Clinical Information

Clinical Criteria & Documentation Requirements

  • Complete medical history including symptom duration, severity, and impact on daily activities
  • Specific terminology such as 'adenomyosis', 'dysmenorrhea', and 'menorrhagia' must be documented
  • Examples include: 'Patient presents with pelvic pain and heavy menstrual bleeding consistent with adenomyosis'
  • Documentation of medical necessity for imaging studies or surgical interventions
  • Quality measures may include documentation of pain assessment and treatment response

Coding Guidelines

Usage Guidelines & Examples

  • Use N80.03 for diagnosed adenomyosis with symptoms such as dysmenorrhea or menorrhagia
  • Do NOT use this code for conditions like endometriosis or uterine fibroids unless specifically diagnosed
  • Related codes include N80.0 (endometriosis of uterus) and N80.1 (endometriosis of ovary), which should not be confused with adenomyosis
  • Common errors include misclassifying adenomyosis as endometriosis; ensure clear documentation of diagnosis
  • In complex cases, consider additional codes for associated symptoms or conditions, ensuring clarity in documentation

Code Exclusions

Important Exclusions

  • Excludes conditions such as uterine fibroids (N80.1) and endometriosis (N80.0) unless specifically diagnosed
  • Alternative codes for excluded conditions include D25 (leiomyoma of uterus) for fibroids
  • Conditions are excluded to ensure accurate diagnosis and treatment planning
  • Common mistakes include coding adenomyosis when the primary diagnosis is actually endometriosis; ensure clarity in documentation
  • Related but distinct conditions include chronic pelvic pain syndromes and other gynecological disorders

Related ICD-10 Codes

Primary Codes
N80.03
Adenomyosis of uterus
N80.0
Endometriosis of uterus
Ancillary Codes
N93.9
R10.2
Differential Codes
N80.1
D25.9

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Gynecology

Specialty Applications

  • Women of reproductive age, particularly those with a history of heavy menstrual bleeding or pelvic pain
  • Patient populations may include those with prior uterine surgeries or hormonal imbalances
  • Clinical settings include outpatient gynecology clinics, emergency departments, and inpatient care for severe cases
  • Specialty-specific applications are primarily in gynecology, but may also involve pain management specialists
  • Treatment contexts include hormonal therapy, pain management, and surgical options such as hysterectomy

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: 'Patient diagnosed with adenomyosis based on clinical findings of dysmenorrhea and imaging results.'

Template 2

Template: 'Clinical presentation consistent with adenomyosis including heavy menstrual bleeding and pelvic pain.'

Template 3

Template: 'Diagnostic criteria for adenomyosis met as evidenced by MRI findings of uterine enlargement.'

Template 4

Template: 'Treatment plan initiated for adenomyosis with hormonal therapy and pain management strategies.'

Template 5

Template: 'Follow-up care for adenomyosis including monitoring of symptom relief and menstrual patterns.'

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 diagnosis?

Detailed documentation should include symptom descriptions, duration, and impact on quality of life.

How does this differ from similar diagnoses?

Adenomyosis is characterized by endometrial tissue within the uterine muscle, while endometriosis involves tissue outside the uterus.

What are common billing considerations?

Ensure that all services provided are medically necessary and clearly documented to optimize claims.

What procedures are typically associated?

Commonly associated procedures include pelvic ultrasounds, MRIs, and potential surgical interventions like hysterectomy.

Are there any quality reporting implications?

Quality measures may include tracking pain management outcomes and adherence to treatment protocols.