ICD-10-CM › N00-N99 › N60-N65 › N60.4 Mammary duct ectasia › N60.42
Mammary duct ectasia of left breast
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Mammary duct ectasia of left breast
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from N60 Benign mammary dysplasia
Includes
- fibrocystic mastopathy
Inherited from the N60-N65 section Disorders of breast (N60-N65)
Excludes1 - never coded here
- disorders of breast associated with childbirth (O91-O92)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Mammitis
- Comedomastitis
- Dilated, dilation
- Mastitis > periductal
- Mastitis > plasma cell
- Dilatation > mammary duct
- Ectasia, ectasis > breast
- Dilatation > duct, mammary
- Disorder > breast > mastitis
- Dysplasia > mammary > duct ectasia
- Infection, infected, infective > breast
- Ectasia, ectasis > mammary duct
Codes in the same group
| Code | Description | Status |
|---|---|---|
| N60.41 | Mammary duct ectasia of right breast | Valid |
| N60.49 | Mammary duct ectasia of unspecified breast | Valid |