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ICD-10 Guide
ICD-10 CodesG43.821

G43.821

Billable

Menstrual migraine, not intractable, with status migrainosus

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 G43.821 is a billable code used to indicate a diagnosis of menstrual migraine, not intractable, with status migrainosus.

Key Diagnostic Point:

Menstrual migraine is a subtype of migraine that is closely linked to the menstrual cycle, typically occurring in relation to hormonal fluctuations. This condition is characterized by recurrent headaches that can be moderate to severe in intensity and are often unilateral. The term 'not intractable' indicates that the migraines are manageable and do not persist for an extended period without relief. Status migrainosus refers to a severe migraine attack that lasts longer than 72 hours, which can significantly impair daily functioning. Patients may experience symptoms such as nausea, vomiting, photophobia, and phonophobia during these episodes. The diagnosis requires a thorough clinical history and may involve tracking headache patterns in relation to the menstrual cycle. Effective management often includes both acute treatments for migraine attacks and preventive strategies aimed at reducing the frequency and severity of episodes, particularly around the time of menstruation.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between menstrual and non-menstrual migraines
  • Identifying status migrainosus versus typical migraine episodes
  • Understanding the patient's hormonal history and its impact on migraines
  • Documenting the frequency and duration of migraine episodes accurately

Audit Risk Factors

  • Inadequate documentation of menstrual cycle correlation
  • Failure to specify the severity and duration of migraines
  • Misclassification of migraine types
  • Lack of evidence for status migrainosus diagnosis

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed headache diaries, hormonal history, and response to treatments.

Common Clinical Scenarios

Patients presenting with recurrent headaches linked to menstrual cycles, requiring both acute and preventive treatment plans.

Billing Considerations

Neurologists must ensure comprehensive documentation of headache characteristics and menstrual history to support the diagnosis.

Obstetrics/Gynecology

Documentation Requirements

Menstrual history, hormonal treatments, and any related gynecological conditions.

Common Clinical Scenarios

Women experiencing migraines that correlate with their menstrual cycle, often requiring interdisciplinary management.

Billing Considerations

Gynecologists should document any hormonal therapies that may influence migraine patterns.

Coding Guidelines

Inclusion Criteria

Use G43.821 When
  • According to ICD
  • 10 guidelines, G43
  • 821 should be used when the migraine is specifically linked to the menstrual cycle and is not classified as intractable
  • Documentation must support the diagnosis with evidence of menstrual correlation and the nature of the migraine episodes

Exclusion Criteria

Do NOT use G43.821 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for migraine management.

Documentation Requirements

Document the patient's headache history, treatment response, and any changes in symptoms.

Specialty Considerations

Neurologists should ensure thorough documentation of headache characteristics.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of migraine types, including menstrual migraines, which aids in better tracking and management of these conditions.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of migraine types, including menstrual migraines, which aids in better tracking and management of these conditions.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of migraine types, including menstrual migraines, which aids in better tracking and management of these conditions.

Resources

Clinical References

  • •
    American Migraine Foundation

Coding & Billing References

  • •
    American Migraine Foundation

Frequently Asked Questions

What is the difference between menstrual migraine and other types of migraines?

Menstrual migraines are specifically linked to hormonal changes during the menstrual cycle, whereas other types may not have such a clear trigger. They often occur in a predictable pattern related to menstruation.