N63

Non-Billable
ChapterN00–N99
Rankcategory
Official Description

Unspecified lump in breast

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 14: Diseases of the Genitourinary System (N00-N99).

CH14 Parent Instructions

Excludes2(Not included here)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

N60-N65 Parent Instructions

Excludes1(Not coded here)
  • disorders of breast associated with childbirth (O91-O92)

Instructional Notes

Includes
  • Nodule(s) NOS in breast

Clinical Hierarchy

CH14Diseases of the genitourinary system (N00-N99)
N60-N65Disorders of breast (N60-N65)
N63Unspecified lump in breast
N63.0Unspecified lump in unspecified breast
N63.1Unspecified lump in the right breast
N63.2Unspecified lump in the left breast
N63.3Unspecified lump in axillary tail
N63.4Unspecified lump in breast, subareolar

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to N63:

blockN60-N65
Disorders of breast (N60-N65)
View context instructions
chapterCH14
Diseases of the genitourinary system (N00-N99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to N63. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

21 raw paths
Breast1 unique routes
nodule→N63
Lump17 unique routes
breast→N63(17 variants)
axillary tail(2 variants)
left→N63
right→N63
left(6 variants)
lower inner quadrant→N63
lower outer quadrant→N63
overlapping quadrants→N63
unspecified quadrant→N63
upper inner quadrant→N63
upper outer quadrant→N63
right(6 variants)
lower inner quadrant→N63
lower outer quadrant→N63
overlapping quadrants→N63
unspecified quadrant→N63
upper inner quadrant→N63
upper outer quadrant→N63
subareolar(2 variants)
left→N63
right→N63
Mass1 unique routes
breast→N63
Nodule (s), nodular1 unique routes
breast NEC→N63
Swelling (of)1 unique routes
breast→N63

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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