N6012 - Diffuse cystic mastopathy (fibrocystic breast condition) affecting the left breast

International Classification of Diseases

Last updated: 5/15/2026

What is a ICD-10 Code?

ICD-10 (International Classification of Diseases, 10th Revision) codes are used to classify and code all diagnoses, symptoms, and procedures recorded in association with hospital care. These codes provide a standardized way to track health conditions and their treatment outcomes.

Detailed Description

This code refers to diffuse cystic mastopathy of the left breast, which is a benign (non-cancerous) breast condition. Also known as fibrocystic breast disease, this condition involves the development of fluid-filled cysts and fibrous tissue throughout the breast tissue. It's a common, non-malignant condition that can cause breast tenderness, lumpiness, or pain, particularly before menstrual periods. The term 'diffuse' means the condition affects multiple areas of the breast rather than being localized to one spot. This is specifically documented for the left breast.

Additional Information

This is a benign breast condition that does not increase cancer risk significantly. Symptoms may fluctuate with menstrual cycles. The procedure classification indicates ultrasound examination was likely performed for diagnosis or monitoring.

Category

Nonmalignant breast conditions

Medical Specialty

Gynecology, Breast Surgery, Primary Care

Expected Costs

Your actual cost will depend on your insurance coverage, provider location, and specific circumstances.

What's Required Before This

  • Clinical breast examination
  • Imaging studies (mammography or ultrasound) may be recommended

What to Expect After

  • Regular breast self-examinations
  • Routine mammography screening as recommended
  • Follow-up with healthcare provider for symptom monitoring
  • Pain management if needed

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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