Is N80.B a billable ICD-10-CM code?

No. N80.B is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does N80.B sit in the tabular list?

Diseases of the genitourinary system (N00-N99), in the block Noninflammatory disorders of female genital tract (N80-N98).

N80.B

N80.B — Endometriosis of cardiothoracic space

Non-billable headerICD-10-CM

N80.B is a non-billable header ICD-10-CM code for endometriosis of cardiothoracic space. It cannot be billed on its own: choose one of the more specific child codes below.

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

, if applicable:
catamenial hemothorax (J94.2)
catamenial pneumothorax (J93.12)

Inclusion terms

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

Endometriosis of thorax

Other codes that can never be billed with N80.B

These codes carry an Excludes1 note pointing at N80.B. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading N80.B alone.

N85Other noninflammatory disorders of uterus, except cervix

Risk adjustment

N80.B 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 history

N80.B has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead N80.B

6 child codes. Green means billable.

Related codes at this level

Codes that share N80. If N80.B is not quite right, the correct code is usually one of these.

Questions about N80.B

Is N80.B a billable ICD-10-CM code?: No. N80.B is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does N80.B sit in the tabular list?: Diseases of the genitourinary system (N00-N99), in the block Noninflammatory disorders of female genital tract (N80-N98).