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Home/Diagnosis/ICD-10 Coding for Ammonia Level

ICD-10 Coding for Ammonia Level

E72.20
E72.29
P74.6

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

Also Known as:
Hyperammonemia
Elevated Ammonia
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Key Information: ICD-10 Coding for Ammonia Level

Essential facts and insights about ICD-10 Coding for Ammonia Level

Use ICD-10 code E72.20 for unspecified urea cycle disorder, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Unspecified urea cycle disorder

Billable Code
E72.20
Billable

Diagnostic Criteria

  • • Confirmed urea cycle defect without specific enzyme deficiency

Applicable To

  • • Urea cycle disorder without specific enzyme deficiency

Important Notes

  • • Ensure the underlying cause is documented and coded first.

Other urea cycle disorders

Billable Code
E72.29
Billable

Diagnostic Criteria

  • • Specific enzyme deficiency confirmed via genetic testing

Applicable To

  • • Specific enzyme deficiencies like ornithine transcarbamylase deficiency

Important Notes

  • • Document specific enzyme deficiency for accurate coding.

Transitory hyperammonemia of newborn

Billable Code
P74.6
Billable

Diagnostic Criteria

  • • Neonatal hyperammonemia resolving within 48–72 hours without metabolic disorder

Applicable To

  • • Transient hyperammonemia resolving within 72 hours

Important Notes

  • • Ensure documentation confirms transient nature of hyperammonemia.
Ancillary Codes

Additional codes that may be used with this diagnosis

R40.2

Coma

Use when hyperammonemia results in coma.

R41.0

Disorientation

Use when hyperammonemia causes disorientation.

R56.9

Seizure, unspecified

Use when seizures occur due to hyperammonemia.

Frequently Asked Questions

What is the ICD-10 code for elevated ammonia levels?

The ICD-10 code for elevated ammonia levels due to urea cycle disorders is E72.29, while P74.6 is used for transient hyperammonemia in newborns.

How is hyperammonemia documented?

Hyperammonemia documentation should include ammonia levels, symptoms, and the underlying cause, such as a urea cycle disorder or drug-induced condition.

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