MCMCB Pro
N64

N64Other disorders of breast

Non-billable headerICD-10-CM

N64 is a non-billable header ICD-10-CM code for other disorders of breast. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

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

Other codes that can never be billed with N64

These codes carry an Excludes1 note pointing at N64. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading N64 alone.

  • R52Pain, unspecified

Risk adjustment

N64 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead N64

8 child codes. Green means billable.

Questions about N64

Is N64 a billable ICD-10-CM code?
No. N64 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does N64 sit in the tabular list?
Diseases of the genitourinary system (N00-N99), in the block Disorders of breast (N60-N65).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.