Non-Billable / Non-Specific Code
ICD-10-CM N63.3 is the diagnosis code for Unspecified lump in axillary tail. This code falls under the section "Disorders of breast" within Chapter 14 — Diseases of the genitourinary system (N00-N99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where N63.3 sits in the ICD-10-CM classification helps ensure proper coding:
No, N63.3 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
N63.3 is the ICD-10-CM diagnosis code for "Unspecified lump in axillary tail". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of N63.3 is N63 ("Unspecified lump in breast"). N63.3 provides a more specific classification within this category.
N63.3 is located in Section N60-N65 — "Disorders of breast" within Chapter 14 of the ICD-10-CM Tabular List.
N63.3 has 2 sub-code(s) that provide more specific detail: N63.31, N63.32.
Use N63.3 when the patients documented diagnosis matches "Unspecified lump in axillary tail" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Unspecified lump in axillary tail is N63.3.
No, N63.3 is non-billable. Use a more specific sub-code for primary diagnosis billing.
N63.3 is in Chapter 14 of the ICD-10-CM Tabular List.
Yes, N63.3 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.