ICD-10-CM 2027 diagnosis code

I27.2Other secondary pulmonary hypertension

Not billable — use a more specific code

I27.2 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About I27.2

I27.2 is the ICD-10-CM diagnosis code for other secondary pulmonary hypertension. 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 a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within I27, choose I27.2 (Other secondary pulmonary hypertension) only when documentation doesn't support a more specific option: primary pulmonary hypertension (I27.0), Kyphoscoliotic heart disease (I27.1), other specified pulmonary heart diseases (I27.8) and pulmonary heart disease, unspecified (I27.9).

To report this condition, pick the subcode that matches the documentation: I27.20 (unspecified), I27.21 (hypertension), I27.22 (disease), I27.23 (hypoxia), I27.24 (hypertension) and I27.29 (hypertension).

Don't report I27.2 together with the conditions in its Excludes1 note: Eisenmenger's syndrome (I27.83).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2018 (expanded into subcodes).

Specific codes under I27.2

Coding notes

Excludes1Not coded here — never report together with this code

Eisenmenger's syndrome (I27.83)

Code alsoTwo codes may be needed; sequencing depends on circumstances

associated underlying condition

Notes that apply from higher levels

Instructions written at a parent level also apply to I27.2.

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

Codes whose notes reference I27.2

I5ACode first
P24.01Use additional code
P24.11Use additional code
P24.21Use additional code
P24.31Use additional code
P24.81Use additional code

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
FY2018 (effective 10/1/2017): Expanded — no longer billable

Common questions about I27.2

Is I27.2 billable?: No. I27.2 is a header code. Report one of its more specific subcodes instead.