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Home/Diagnosis/ICD-10 Coding for Low T4

ICD-10 Coding for Low T4

E03.9
E89.0
E03.2

Complete ICD-10-CM coding and documentation guide for icd-10 coding for low t4 includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Hypothyroidism
Thyroxine Deficiency
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Key Information: ICD-10 Coding for Low T4

Essential facts and insights about ICD-10 Coding for Low T4

Use ICD-10 code E03.9 for hypothyroidism, unspecified, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Hypothyroidism, unspecified

Billable Code
E03.9
Billable

Diagnostic Criteria

clinical:
  • • Presence of elevated TSH and low free T4
documentation:
  • • Lack of specific etiology documentation

Applicable To

  • • Low T4 with elevated TSH

Important Notes

  • • Ensure lab results and symptoms are documented to support the use of this code.

Postprocedural hypothyroidism

Billable Code
E89.0
Billable

Diagnostic Criteria

clinical:
  • • Documented history of thyroid surgery
  • • Low T4 and elevated TSH post-surgery

Applicable To

  • • Hypothyroidism following thyroidectomy

Important Notes

  • • Ensure procedural history is clearly documented.

Hypothyroidism due to drugs

Billable Code
E03.2
Billable

Diagnostic Criteria

clinical:
  • • Temporal relationship between drug use and onset of hypothyroidism
  • • Low T4 and elevated TSH

Applicable To

  • • Drug-induced hypothyroidism

Important Notes

  • • Document the drug name and timing of hypothyroidism onset.
Ancillary Codes

Additional codes that may be used with this diagnosis

R94.6

Abnormal thyroid function studies

Use when thyroid function tests are abnormal but the cause is not yet determined.

Frequently Asked Questions

What is the ICD-10 code for low T4?

The ICD-10 code for low T4, when unspecified, is E03.9. For specific causes like postprocedural or drug-induced hypothyroidism, use E89.0 or E03.2 respectively.

How do you document low T4 in medical records?

Document low T4 by including lab results showing TSH and free T4 levels, along with any symptoms and treatment plans.

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