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Q83.1

Accessory breast

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 3 never code together
Q83code
Excludes2
  • absence of pectoral muscle (Q79.8)Q79.8
  • hypoplasia of breast (N64.82)N64.82
  • micromastia (N64.82)N64.82

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 1
Q83.1code
Inclusion terms
  • Supernumerary breast
Index entries leading here 4
  • Accessory (congenital)
    • breast tissue, axilla Q83.1
  • Axilla, axillary — see also condition
  • Supernumerary (congenital)
  • Polymastia Q83.1
Alongside this code 5 same parent — Q83
Q83.0 Congenital absence of breast with absent nipple Q83.2 Absent nipple Q83.3 Accessory nipple Q83.8 Other congenital malformations of breast Q83.9 Congenital malformation of breast, unspecified
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
Q83
Block
Q80-Q89
Siblings
5

Present FY2024–FY2027.