N63.23 – Unspecified lump in the left breast, lower outer quadrant
ICD-10-CM 2027 diagnosis code · Disorders of breast
ICD-10-CM code
N63.23
- Code
N63.23(claims format:N6323)- Description
- Unspecified lump in the left breast, lower outer quadrant
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 14. Diseases of the genitourinary system (N00-N99)
- Block
- N60-N65 Disorders of breast
- Parent codes
- N63 › N63.2
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
N63 – Unspecified lump in breast
Applicable to:
- Nodule(s) NOS in breast
Block N60-N65
Index terms for N63.23
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in N63.2
- N63.20 – Unspecified lump in the left breast, unspecified quadrantBillable
- N63.21 – Unspecified lump in the left breast, upper outer quadrantBillable
- N63.22 – Unspecified lump in the left breast, upper inner quadrantBillable
- N63.24 – Unspecified lump in the left breast, lower inner quadrantBillable
- N63.25 – Unspecified lump in the left breast, overlapping quadrantsBillable
Frequently asked questions
What is ICD-10 code N63.23?
N63.23 is the ICD-10-CM code for unspecified lump in the left breast, lower outer quadrant, in the block N60-N65 (Disorders of breast).
Is N63.23 a billable code?
Yes. N63.23 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does N63.23 belong to?
It belongs to category N63 – Unspecified lump in breast.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.