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ICD-10 Guide
ICD-10 CodesP74.421

P74.421

Billable

Hyperchloremia of newborn

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 P74.421 is a billable code used to indicate a diagnosis of hyperchloremia of newborn.

Key Diagnostic Point:

Hyperchloremia in newborns refers to an elevated level of chloride in the blood, which can occur due to various factors including dehydration, renal dysfunction, or excessive chloride intake. This condition is often transient and may resolve with appropriate management. In neonates, hyperchloremia can be associated with other electrolyte imbalances, such as hypernatremia or hypokalemia, and may indicate underlying metabolic disturbances. Clinicians must monitor electrolyte levels closely, especially in premature infants or those with significant health issues. Treatment typically involves correcting the underlying cause, which may include fluid replacement or adjustments in electrolyte administration. Understanding the clinical context and potential complications is crucial for effective management and coding of this condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation among different newborn populations.
  • Need for comprehensive electrolyte panel interpretation.
  • Potential overlap with other electrolyte disturbances.
  • Documentation requirements for underlying causes and treatment plans.

Audit Risk Factors

  • Inadequate documentation of electrolyte levels.
  • Failure to note underlying causes of hyperchloremia.
  • Misclassification of transient versus chronic conditions.
  • Inconsistent coding of related electrolyte disturbances.

Specialty Focus

Medical Specialties

Neonatology

Documentation Requirements

Detailed records of electrolyte levels, treatment protocols, and clinical observations.

Common Clinical Scenarios

NICU admissions for dehydration, renal impairment, or after surgical interventions.

Billing Considerations

Consideration of gestational age and birth weight in interpreting electrolyte levels.

Pediatrics

Documentation Requirements

Thorough documentation of patient history, presenting symptoms, and follow-up care.

Common Clinical Scenarios

Pediatric patients with a history of perinatal complications or metabolic disorders.

Billing Considerations

Awareness of developmental milestones and their impact on metabolic health.

Coding Guidelines

Inclusion Criteria

Use P74.421 When
  • Follow the official ICD
  • CM guidelines for coding electrolyte imbalances, ensuring accurate documentation of the clinical context and any associated conditions

Exclusion Criteria

Do NOT use P74.421 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

36415CPT Code

Collection of venous blood by venipuncture

Clinical Scenario

Used to obtain blood samples for electrolyte testing in newborns.

Documentation Requirements

Document the reason for blood draw and any relevant clinical findings.

Specialty Considerations

Neonatologists should ensure that the procedure is justified based on clinical need.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of electrolyte imbalances, improving the accuracy of diagnoses and treatment tracking in neonatal care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of electrolyte imbalances, improving the accuracy of diagnoses and treatment tracking in neonatal care.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of electrolyte imbalances, improving the accuracy of diagnoses and treatment tracking in neonatal care.

Resources

Clinical References

  • •
    Neonatal Electrolyte Management Guidelines

Coding & Billing References

  • •
    Neonatal Electrolyte Management Guidelines

Frequently Asked Questions

What are the common causes of hyperchloremia in newborns?

Common causes include dehydration, renal dysfunction, and excessive chloride intake, often requiring careful monitoring and management in the NICU.