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ICD-10-CM 2027 diagnosis code

I27.82Chronic pulmonary embolism

✓ Billable / specificCC — complication/comorbidity

I27.82 is a valid, billable ICD-10-CM code for chronic pulmonary embolism. 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 I27.82

I27.82 is the ICD-10-CM diagnosis code for chronic pulmonary embolism. It belongs to category I27 (other pulmonary heart diseases), 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 I27.8 (other specified pulmonary heart diseases), I27.82 is specifically for chronic pulmonary embolism. Related codes cover cor pulmonale (chronic) (I27.81), Eisenmenger's syndrome (I27.83), Fontan related circulation (I27.84) and other specified pulmonary heart diseases (I27.89).

Don't report I27.82 together with the conditions in its Excludes1 note: personal history of pulmonary embolism (Z86.711).

Use an additional code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" 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 416.2 (chronic pulmonary embolism).

Coding notes

Excludes1Not coded here — never report together with this code
  • personal history of pulmonary embolism (Z86.711)
Use additional codeAdd a secondary code to fully describe the condition
  • code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01)

Notes that apply from higher levels

Instructions written at a parent level also apply to I27.82.

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

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to I27.82.

Codes whose notes reference I27.82

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 →
  • 416.2Chronic pulmonary embolismexact

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 I27.82

Is I27.82 billable?

Yes. I27.82 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can I27.82 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict I27.82 as a principal diagnosis.

Is I27.82 a CC or MCC?

I27.82 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does I27.82 group to?

I27.82 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 I27.82?

The CMS General Equivalence Mappings map I27.82 to ICD-9-CM 416.2.