N80.B4 Endometriosis of the pericardial space

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) 742-743 in MDC 13.

Code annotations containing back-references to N80.B4

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.B4

• Endometriosis › pericardial space

Nearby codes

• N80.B2 Endometriosis of lung
• N80.B3 Endometriosis of diaphragm
• N80.B31 Superficial endometriosis of diaphragm
• N80.B32 Deep endometriosis of diaphragm
• N80.B39 Endometriosis of diaphragm, unspecified depth
• N80.B4 Endometriosis of the pericardial space (this code)
• N80.B5 Endometriosis of the mediastinal space
• N80.B6 Endometriosis of cardiothoracic space
• N80.C Endometriosis of the abdomen
• N80.C0 Endometriosis of the abdomen, unspecified
• N80.C1 Endometriosis of the anterior abdominal wall