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ICD-10-CM 2027 diagnosis code

I26.0Pulmonary embolism with acute cor pulmonale

Not billable — use a more specific code

I26.0 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About I26.0

I26.0 is the ICD-10-CM diagnosis code for pulmonary embolism with acute cor pulmonale. It belongs to category I26 (pulmonary embolism), block I26-I28 (pulmonary heart disease and diseases of pulmonary circulation) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

Within I26 (pulmonary embolism), I26.0 is specifically for pulmonary embolism with acute cor pulmonale. Related codes cover without acute cor pulmonale (I26.9).

To report this condition, pick the subcode that matches the documentation: I26.01 (pulmonale), I26.02 (pulmonale), I26.03 (pulmonale), I26.04 (pulmonale) and I26.09 (pulmonale).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under I26.0

Notes that apply from higher levels

Instructions written at a parent level also apply to I26.0.

› From I26 Pulmonary embolism
Includes
  • pulmonary (acute) (artery)(vein) infarction
  • pulmonary (acute) (artery)(vein) thromboembolism
  • pulmonary (acute) (artery)(vein) thrombosis
Excludes1
  • cor pulmonale without embolism (I27.81)
Excludes2
  • chronic pulmonary embolism (I27.82)
  • personal history of pulmonary embolism (Z86.711)
  • pulmonary embolism complicating abortion, ectopic or molar pregnancy (O00-O07, O08.2)
  • pulmonary embolism complicating pregnancy, childbirth and the puerperium (O88.-)
  • pulmonary embolism due to trauma (T79.0, T79.1)
  • pulmonary embolism due to complications of surgical and medical care (T80.0, T81.7-, T82.8-)
  • septic (non-pulmonary) arterial embolism (I76)

Broader instructions also apply from Chapter 9: Diseases of the circulatory system.

Codes whose notes reference I26.0

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about I26.0

Is I26.0 billable?

No. I26.0 is a header code. Report one of its more specific subcodes instead.