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ICD-10 Guide
ICD-10 CodesQ82.2

Q82.2

Billable

Congenital cutaneous mastocytosis

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

Code Description

ICD-10 Q82.2 is a billable code used to indicate a diagnosis of congenital cutaneous mastocytosis.

Key Diagnostic Point:

Congenital cutaneous mastocytosis is a rare skin disorder characterized by an abnormal accumulation of mast cells in the skin. This condition typically presents at birth or in early infancy and manifests as brownish-yellow macules, papules, or plaques that can vary in size and distribution. The lesions are often asymptomatic but may become itchy or urticarial upon physical stimulation. The condition is generally benign and may resolve spontaneously over time, although some cases can persist into adulthood. Diagnosis is primarily clinical, supported by histological examination showing an increased number of mast cells in the dermis. It is important to differentiate congenital cutaneous mastocytosis from other skin lesions and conditions, such as urticaria pigmentosa and other mast cell disorders, to ensure appropriate management and follow-up.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of symptoms
  • Need for differential diagnosis with other skin conditions
  • Potential for associated systemic symptoms in severe cases
  • Documentation of family history and genetic predisposition

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to document associated symptoms or complications
  • Misclassification of the condition with other skin disorders
  • Lack of follow-up documentation for ongoing management

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Pediatric documentation should include detailed descriptions of skin lesions, onset, and any associated symptoms. Family history of mast cell disorders should also be documented.

Common Clinical Scenarios

Common scenarios include newborns presenting with skin lesions, parents concerned about the appearance of the skin, and cases requiring referral to dermatology for further evaluation.

Billing Considerations

Special considerations include monitoring for potential systemic involvement and educating families about the benign nature of the condition.

Genetics

Documentation Requirements

Genetic documentation should include family history, any known genetic syndromes, and results from genetic testing if performed.

Common Clinical Scenarios

Genetic counseling may be needed for families with a history of mast cell disorders or when there is uncertainty about the diagnosis.

Billing Considerations

Considerations include understanding the genetic basis of mast cell disorders and the implications for family members.

Coding Guidelines

Inclusion Criteria

Use Q82.2 When
  • According to ICD
  • 10 coding guidelines, congenital conditions should be coded based on clinical documentation, ensuring that the diagnosis is confirmed and that any associated conditions are also documented

Exclusion Criteria

Do NOT use Q82.2 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

11100CPT Code

Biopsy of skin, excisional

Clinical Scenario

Used when a biopsy is performed to confirm the diagnosis of congenital cutaneous mastocytosis.

Documentation Requirements

Documentation must include the reason for the biopsy and the findings.

Specialty Considerations

Dermatology may require specific details about the lesion's characteristics.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of congenital conditions, improving the accuracy of data collection and reimbursement processes for congenital cutaneous mastocytosis.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of congenital conditions, improving the accuracy of data collection and reimbursement processes for congenital cutaneous mastocytosis.

Reimbursement & Billing Impact

reimbursement processes for congenital cutaneous mastocytosis.

Resources

Clinical References

  • •
    American Academy of Pediatrics - Congenital Skin Disorders

Coding & Billing References

  • •
    American Academy of Pediatrics - Congenital Skin Disorders

Frequently Asked Questions

What is the prognosis for congenital cutaneous mastocytosis?

The prognosis for congenital cutaneous mastocytosis is generally good, as many cases resolve spontaneously during childhood. However, some patients may experience persistent lesions or develop systemic symptoms, necessitating ongoing monitoring and management.