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ICD-10 Guide
ICD-10 CodesChapter 17: Congenital malformations and chromosomal abnormalitiesQ36

Q36

Billable

Cleft lip

Chapter 17:Congenital malformations and chromosomal abnormalities

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

Code Description

ICD-10 Q36 is a billable code used to indicate a diagnosis of cleft lip.

Key Diagnostic Point:

Cleft lip is a congenital malformation characterized by an opening or gap in the upper lip that can occur on one or both sides of the lip. This condition arises during early fetal development when the tissues that form the lip do not fully come together. Cleft lip can occur in isolation or in conjunction with a cleft palate, which is a similar defect affecting the roof of the mouth. The severity of cleft lip can vary significantly, ranging from a small notch in the lip to a large gap that extends up into the nose. This condition can lead to various complications, including difficulties with feeding, speech, and dental issues. Surgical intervention is typically required to repair the cleft and improve function and appearance. The timing of surgery often depends on the severity of the cleft and the overall health of the infant. Genetic factors may play a role in the occurrence of cleft lip, and it is often associated with other congenital anomalies, particularly those affecting the respiratory system, such as choanal atresia and tracheoesophageal fistula.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in presentation and severity of cleft lip
  • Potential association with other congenital anomalies
  • Need for multidisciplinary care and documentation
  • Variations in surgical repair techniques

Audit Risk Factors

  • Inadequate documentation of associated congenital anomalies
  • Failure to capture multiple surgical procedures
  • Misclassification of cleft lip severity
  • Inconsistent coding of related respiratory conditions

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Documentation should include details of the cleft's severity, associated conditions, and any surgical interventions performed.

Common Clinical Scenarios

Infants presenting with feeding difficulties, speech delays, or requiring surgical repair.

Billing Considerations

Coders must be aware of the potential for multiple surgeries and the need for ongoing follow-up care.

Genetics

Documentation Requirements

Genetic testing results, family history of congenital anomalies, and any syndromic associations should be documented.

Common Clinical Scenarios

Cases where cleft lip is part of a genetic syndrome or when genetic counseling is provided.

Billing Considerations

Consideration of chromosomal abnormalities that may be associated with cleft lip, such as 22q11.2 deletion syndrome.

Coding Guidelines

Inclusion Criteria

Use Q36 When
  • Follow the official ICD
  • CM guidelines for coding congenital malformations, ensuring accurate documentation of associated conditions and surgical procedures

Exclusion Criteria

Do NOT use Q36 When
No specific exclusions found.

Related CPT Codes

40700CPT Code

Repair of cleft lip

Clinical Scenario

Used during surgical repair of cleft lip in infants.

Documentation Requirements

Operative report detailing the procedure and any complications.

Specialty Considerations

Pediatric surgical documentation must include pre-operative assessments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of cleft lip, enabling better tracking of associated conditions and outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of cleft lip, enabling better tracking of associated conditions and outcomes.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American Cleft Palate-Craniofacial Association

Coding & Billing References

  • •
    American Cleft Palate-Craniofacial Association

Frequently Asked Questions

What is the difference between cleft lip and cleft palate?

Cleft lip refers to a gap in the upper lip, while cleft palate involves a gap in the roof of the mouth. They can occur together or separately.