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ICD-10-CM 2027 diagnosis code

N80.B3Endometriosis of diaphragm

Not billable — use a more specific code

N80.B3 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N80.B3

N80.B3 is the ICD-10-CM diagnosis code for endometriosis of diaphragm. It belongs to category N80 (endometriosis), block N80-N98 (noninflammatory disorders of female genital tract) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within N80.B (endometriosis of cardiothoracic space), N80.B3 is specifically for endometriosis of diaphragm. Related codes cover pleura (N80.B1), lung (N80.B2), the pericardial space (N80.B4), the mediastinal space (N80.B5) and cardiothoracic space (N80.B6).

To report this condition, pick the subcode that matches the documentation: N80.B31 (diaphragm), N80.B32 (diaphragm) and N80.B39 (unspecified depth).

It was added in FY2023, effective October 1, 2022.

Specific codes under N80.B3

Notes that apply from higher levels

Instructions written at a parent level also apply to N80.B3.

› From N80.B Endometriosis of cardiothoracic space
Code also
  • , if applicable:
  • catamenial hemothorax (J94.2)
  • catamenial pneumothorax (J93.12)

Broader instructions also apply from Chapter 14: Diseases of the genitourinary system.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2023 (effective 10/1/2022): Added
  • No changes since FY2023.

Common questions about N80.B3

Is N80.B3 billable?

No. N80.B3 is a header code. Report one of its more specific subcodes instead.