DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q83 Congenital malformations of breast

  • Header · not billable

Q83 is not billable. The category heads 6 billable codes in FY2027: the 6 codes directly below it.

Index → code

  • Polymastia → Q83.1
  • Amastia (with nipple present) → Q83.8
  • Agenesisnipple → Q83.2

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q80-Q89 Other congenital malformations (Q80-Q89)
  3. Q83 Congenital malformations of breast
Billable codes
6
Subdivisions
6
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
26

Codes in Q83

  1. Q83.0
    Congenital absence of breast with absent nipple
    BillableExempt
  2. Q83.1
    Accessory breast
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Supernumerary breast
  3. Q83.2
    Absent nipple
    BillableExempt
  4. Q83.3
    Accessory nipple
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Supernumerary nipple
  5. Q83.8
    Other congenital malformations of breast
    BillableExempt
  6. Q83.9
    Congenital malformation of breast, unspecified
    BillableExempt

Sources of each column.

Instructions

At Q83

Excludes2

  • absence of pectoral muscle (Q79.8) Q79.8
  • hypoplasia of breast (N64.82) N64.82
  • micromastia (N64.82) N64.82

Notes that also apply

Chapter 17 instructions (Notes 1, Excludes2 1): printed on the chapter 17 page.

Index entries

  • Polymastia → Q83.1
  • Amastia (with nipple present) → Q83.8
  • Amastia (with nipple present)with absent nipple → Q83.0
  • Accessory (congenital)breast tissue, axilla → Q83.1
  • Axilla, axillarybreast → Q83.1
  • Supernumerary (congenital)breast → Q83.1
  • Agenesisnipple → Q83.2
  • Accessory (congenital)nipple → Q83.3
  • Supernumerary (congenital)nipple(s) → Q83.3
  • Aberrant (congenital)breast → Q83.8
  • Agenesisbreast (with nipple present) → Q83.8
  • Ectopic, ectopia (congenital)breast tissue → Q83.8
  • Hypoplasia, hypoplasticareola, congenital → Q83.8
  • Hypoplasia, hypoplasticmammary (areola), congenital → Q83.8
  • Anomaly, anomalous (congenital) (unspecified type)breast → Q83.9
  • Anomaly, anomalous (congenital) (unspecified type)nipple → Q83.9
  • Deformitynipple (congenital) → Q83.9
  • Malformation (congenital)breast → Q83.9
  • Agenesisbreast (with nipple present)with absent nipple → Q83.0
  • Absence (of) (organ or part) (complete or partial)nipple(s) (with breast(s)) (acquired)congenital → Q83.2
  • Absence (of) (organ or part) (complete or partial)breast(s) (and nipple(s)) (acquired)congenital → Q83.8
  • Inversionnipplecongenital → Q83.8
  • Malformation (congenital)breastspecified type NEC → Q83.8
  • Malpositioncongenitalbreast → Q83.8
  • Retractionnipplecongenital → Q83.8
  • Deformitybreast (acquired)congenital → Q83.9

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy