Congenital malformations of breast (Q83) ICD-10-CM
The Q83 code range covers congenital malformations of breast with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the Q83 Range 7 codes · 6 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q83 range.
Choanal Atresia
A congenital abnormality that is characterized by a blocked CHOANAE, the opening between the nose and the NASOPHARYNX. Blockage can be unilateral or bilateral; bony or membranous.
About the Q83 Code Range
ICD-10 code Q83 covers congenital malformations of the breast, including a range of structural abnormalities present at birth such as absent breasts, accessory breast tissue, and nipple anomalies.
The section includes specific codes like Q83.0 for congenital absence of breast with absent nipple, and Q83.1 for accessory breast, which refers to extra breast tissue developing in unusual locations. Q83.2 and Q83.3 specifically address absence of the nipple and accessory nipples respectively, conditions often described by terms like athelia or polythelia syndrome that may be encountered by coders. Q83.8 involves other congenital abnormalities such as nipple inversion, hypoplasia, tubular breast, or asymmetry, while Q83.9 assigns unspecified congenital breast malformations when precise details are missing. Using these codes enables medical professionals to capture the exact congenital breast anomalies, some of which are also referenced under synonyms like "congenital absence of breast," "nipple deformity," or "Ulnar mammary syndrome," thus supporting accurate identification and classification of these unique birth defects.
Questions About This Page
How many billable codes are in the Q83 range?
Of the 7 codes in this range, 6 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the Q83 range classify?
The range classifies congenital malformations of breast. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
