N64.1

N64.1: Fat necrosis of breast

Billable / specific codeICD-10-CM

N64.1 is a billable, specific ICD-10-CM code for fat necrosis of breast. It is valid for submission on a claim.

Check N64.1 with the rest of the claim: free scrubber

Code first

The underlying condition must be sequenced before this code.

breast necrosis due to breast graft (T85.898)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Fat necrosis (segmental) of breast

Excludes2 inherited from the categories above N64.1

Not part of this code, but both may be coded when both are present.

Written on N64: Other disorders of breast

mechanical complication of breast prosthesis and implant (T85.4-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

N64.1 is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52849Billing and Coding: Breast Imaging: Breast Echography (Sonography)/Breast MRI/Ductography
A56448Billing and Coding: Breast Imaging Mammography/Breast Echography (Sonography)/Breast MRI/Ductography
A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
A56587Billing and Coding: Cosmetic and Reconstructive Surgery

Alphabetic index entries that lead here

Necrosis, necrotic›breast(aseptic) (fat) (segmental)
Necrosis, necrotic›mammary gland(fat) (segmental)
Fat›necrosis›breast
Necrosis, necrotic›fat, fatty›breast(aseptic) (segmental)

Code history

Unchanged in every release from FY2024 to FY2027.