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ICD-10-CM 2027 diagnosis code

I26.02Saddle embolus of pulmonary artery with acute cor pulmonale

✓ Billable / specificMCC — major complication/comorbidity

I26.02 is a valid, billable ICD-10-CM code for saddle embolus of pulmonary artery with acute cor pulmonale. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 I26.02

I26.02 is the ICD-10-CM diagnosis code for saddle embolus of pulmonary artery 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within I26.0 (pulmonary embolism with acute cor pulmonale), I26.02 is specifically for saddle embolus of pulmonary artery with acute cor pulmonale. Related codes cover septic pulmonary embolism with acute cor pulmonale (I26.01), cement embolism of pulmonary artery with acute cor pulmonale (I26.03), fat embolism of pulmonary artery with acute cor pulmonale (I26.04) and other pulmonary embolism with acute cor pulmonale (I26.09).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 173 (Ultrasound Accelerated and Other Thrombolysis with Principal Diagnosis Pulmonary Embolism, relative weight 2.9556), DRG 175 (Pulmonary Embolism with MCC or Acute Cor Pulmonale, relative weight 1.3652), DRG 176 (Pulmonary Embolism without MCC, relative weight 0.8063), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 04 (Diseases and Disorders of the Respiratory System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

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

Before ICD-10, this condition was coded in ICD-9-CM as 415.0 (acute cor pulmonale) and 415.13 (saddle embolus of pulmonary artery).

Notes that apply from higher levels

Instructions written at a parent level also apply to I26.02.

› 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.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to I26.02.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 415.0Acute cor pulmonaleapproximate, combination
  • 415.13Saddle embolus of pulmonary arteryapproximate, combination

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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 I26.02

Is I26.02 billable?

Yes. I26.02 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can I26.02 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict I26.02 as a principal diagnosis.

Is I26.02 a CC or MCC?

I26.02 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does I26.02 group to?

I26.02 is used in the MS-DRG v44.0 logic for MS-DRG 173 (Ultrasound Accelerated and Other Thrombolysis with Principal Diagnosis Pulmonary Embolism), MS-DRG 175 (Pulmonary Embolism with MCC or Acute Cor Pulmonale), MS-DRG 176 (Pulmonary Embolism without MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for I26.02?

The CMS General Equivalence Mappings map I26.02 to ICD-9-CM 415.0 and 415.13.