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ICD-10 Guide
ICD-10 CodesE03.8

E03.8

Billable

Other specified hypothyroidism

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

Code Description

ICD-10 E03.8 is a billable code used to indicate a diagnosis of other specified hypothyroidism.

Key Diagnostic Point:

Other specified hypothyroidism (E03.8) refers to a category of hypothyroidism that does not fall under the more common classifications such as primary or secondary hypothyroidism. This condition can arise from various etiologies, including autoimmune disorders, congenital defects, or as a result of treatment for hyperthyroidism. Patients may present with symptoms such as fatigue, weight gain, cold intolerance, and depression. The diagnosis is typically confirmed through thyroid function tests, which measure levels of Thyroid Stimulating Hormone (TSH) and free thyroxine (FT4). In cases of iodine deficiency, which is a common cause of hypothyroidism globally, the thyroid gland is unable to produce sufficient thyroid hormones, leading to compensatory increases in TSH. This code is essential for capturing the nuances of hypothyroidism that do not fit neatly into other categories, allowing for more precise treatment and management of patients.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes leading to the condition
  • Need for comprehensive thyroid function tests interpretation
  • Differentiation from other thyroid disorders
  • Potential for coexisting conditions affecting thyroid function

Audit Risk Factors

  • Inadequate documentation of symptoms
  • Failure to document thyroid function test results
  • Misclassification of hypothyroidism type
  • Lack of clarity on the underlying cause

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Thorough documentation of thyroid function tests, patient symptoms, and treatment plans.

Common Clinical Scenarios

Patients presenting with fatigue, weight changes, and abnormal thyroid function tests.

Billing Considerations

Ensure that all relevant lab results are included in the documentation to support the diagnosis.

Primary Care

Documentation Requirements

Detailed patient history, physical examination findings, and any referrals to specialists.

Common Clinical Scenarios

Routine screening for thyroid disorders in patients with risk factors such as family history or previous thyroid issues.

Billing Considerations

Documenting any changes in symptoms or medication adherence is crucial for accurate coding.

Coding Guidelines

Inclusion Criteria

Use E03.8 When
  • According to ICD
  • 10 guidelines, E03
  • 8 should be used when the hypothyroidism is specified but does not fit into other defined categories
  • Coders must ensure that the documentation supports the diagnosis and that the underlying cause is clearly stated

Exclusion Criteria

Do NOT use E03.8 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

84443CPT Code

Thyroid stimulating hormone (TSH)

Clinical Scenario

Used to confirm diagnosis of hypothyroidism.

Documentation Requirements

Document the reason for the test and the results.

Specialty Considerations

Endocrinologists may require additional tests to assess thyroid function.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of hypothyroidism, enabling better tracking of patient outcomes and treatment efficacy. E03.8 provides a means to capture cases that do not fit into standard categories, improving the granularity of data for research and clinical management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of hypothyroidism, enabling better tracking of patient outcomes and treatment efficacy. E03.8 provides a means to capture cases that do not fit into standard categories, improving the granularity of data for research and clinical management.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of hypothyroidism, enabling better tracking of patient outcomes and treatment efficacy. E03.8 provides a means to capture cases that do not fit into standard categories, improving the granularity of data for research and clinical management.

Resources

Clinical References

  • •
    American Thyroid Association

Coding & Billing References

  • •
    American Thyroid Association

Frequently Asked Questions

What is the difference between E03.8 and E03.9?

E03.8 is used for other specified hypothyroidism when the cause is documented, while E03.9 is for unspecified hypothyroidism when no specific cause is provided.