D24.2

Benign neoplasm of left breast

Benign neoplasm of the left breast (D24.2) refers to non-cancerous growths or tumors arising from the glandular, connective, or fatty tissues of the left mammary gland. Unlike malignant neoplasms, these growths do not invade adjacent tissues or metastasize to distant organs. The most common type is a fibroadenoma, which typically presents as a firm, mobile, and painless lump in women of reproductive age. Other types include intraductal papillomas, lipomas, and benign phyllodes tumors. Although non-malignant, these lesions may require clinical monitoring, imaging (such as ultrasound or mammography), or histopathological confirmation via core needle biopsy to definitively exclude malignancy. Management is often conservative unless the lesion grows rapidly, causes significant pain, or creates cosmetic concerns, in which case surgical excision may be performed.

Clinical Symptoms

  • Palpable breast lump that is often smooth, firm, and rubbery
  • High mobility of the lump within the breast tissue ('breast mouse')
  • Localized breast pain or tenderness (mastalgia)
  • Breast asymmetry or visible contour distortion
  • Spontaneous or expressed nipple discharge (more common in intraductal papillomas)
  • Skin dimpling or retraction (rare, but necessitates immediate investigation)
  • Cyclical changes in the size or sensitivity of the mass related to the menstrual cycle
  • Feeling of fullness or heaviness in the left breast

Common Causes

  • Hypersensitivity to the hormone estrogen
  • Fluctuations in reproductive hormone levels during the menstrual cycle
  • Use of oral contraceptive pills or hormone replacement therapy (HRT)
  • Pregnancy and lactation, which can stimulate growth of fibroadenomas
  • Genetic predisposition or family history of benign breast disease
  • Early menarche (starting menstruation before age 12)
  • Late menopause
  • Developmental aberrations of normal breast involution and growth

Documentation & Coding Tips

Explicitly state the breast laterality and specific quadrant for all benign neoplasms to ensure accurate ICD-10 assignment.

Example: Patient with a 2.5 cm palpable mass in the left upper outer quadrant. Diagnostic ultrasound shows a circumscribed, solid, oval mass with macrolobulations. Findings are consistent with a benign neoplasm of the left breast. Billing Focus: Code D24.2 requires explicit documentation of the left side. Risk Adjustment: Distinguishing benign from malignant neoplasms is crucial for accurate HCC hierarchy assignment.

Billing Focus: Laterality (left) and anatomical quadrant specification.

Document the size of the neoplasm and any associated symptoms such as localized pain or skin changes to support medical necessity for imaging or biopsy.

Example: Clinical evaluation of a stable 1.5 cm mobile mass in the left breast, lower inner quadrant. Patient denies nipple discharge or skin retraction. Assessment: Benign neoplasm of left breast (D24.2). Plan: Routine surveillance in 6 months. Billing Focus: Symptom documentation supports the level of medical decision making for E/M services. Risk Adjustment: Chronic monitoring of benign lesions reflects ongoing outpatient management intensity.

Billing Focus: Symptom presence/absence and lesion size for medical necessity.

Distinguish between a generic breast lump and a confirmed benign neoplasm such as a fibroadenoma or phyllodes tumor.

Example: Core needle biopsy of the left breast mass at 2 o clock position confirms a benign fibroadenoma. Final diagnosis: Benign neoplasm of left breast. Billing Focus: Transition from R92.8 (Other abnormal findings on diagnostic imaging of breast) to D24.2 once histology is confirmed. Risk Adjustment: Specificity in diagnosis moves the patient from a symptom-based category to a confirmed disease state.

Billing Focus: Histopathological confirmation vs. symptomatic presentation.

Include documentation of relevant family history of breast disease to support the risk profile for benign lesions with potential for transformation.

Example: Patient presents for evaluation of a new mass in the left breast. History notable for maternal aunt with premenopausal breast cancer. Physical exam reveals a firm, mobile mass in the left upper inner quadrant. Assessment: Benign neoplasm of left breast. Billing Focus: Use of Z80.3 (Family history of malignant neoplasm of breast) as a secondary code. Risk Adjustment: Family history increases the clinical complexity and monitoring frequency, influencing the risk profile.

Billing Focus: Reporting Z-codes for family history to provide clinical context.

Note the relationship of the neoplasm to previous imaging (BI-RADS scoring) to justify diagnostic procedures.

Example: Targeted ultrasound of the left breast at the 9 o clock position, 3 cm from the nipple, demonstrates a 12mm hypoechoic mass, BI-RADS 3. Diagnosis: Benign neoplasm of left breast. Billing Focus: Correlation of BI-RADS score with ICD-10 codes for medical necessity of ultrasound-guided procedures. Risk Adjustment: BI-RADS assessment provides a standardized measure of severity and risk within clinical documentation.

Billing Focus: BI-RADS score correlation for imaging medical necessity.

Relevant CPT Codes