N80.B31 Superficial endometriosis of diaphragm

Billable ICD-10-CM code, FY2026.

Applies from N80.B Endometriosis of cardiothoracic space

Applicable to

• Endometriosis of thorax

Code also

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

MS-DRG index

Defines the logic of DRG(s) 205-206 in MDC 04.

Code annotations containing back-references to N80.B31

Back-references to N80.B

• Code First: J93.12 Secondary spontaneous pneumothorax ("catamenial pneumothorax due to endometriosis (N80.B-)")

Back-references to N80

• Type 1 Excludes: N85 Other noninflammatory disorders of uterus, except cervix ("endometriosis (N80.-)")

Diagnosis Index entries for N80.B31

• Endometriosis › diaphragm › superficial

Nearby codes

• N80.A69 Endometriosis of unspecified ureter, unspecified depth
• N80.B Endometriosis of cardiothoracic space
• N80.B1 Endometriosis of pleura
• N80.B2 Endometriosis of lung
• N80.B3 Endometriosis of diaphragm
• N80.B31 Superficial endometriosis of diaphragm (this code)
• N80.B32 Deep endometriosis of diaphragm
• N80.B39 Endometriosis of diaphragm, unspecified depth
• N80.B4 Endometriosis of the pericardial space
• N80.B5 Endometriosis of the mediastinal space
• N80.B6 Endometriosis of cardiothoracic space