Is I27.0 a billable ICD-10-CM code?

Yes. I27.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I27.0 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Pulmonary heart disease and diseases of pulmonary circulation (I26-I28).

What cannot be coded together with I27.0?

I27.0 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I27.0

I27.0 — Primary pulmonary hypertension

Billable / specific codeICD-10-CM

I27.0 is a billable, specific ICD-10-CM code for primary pulmonary hypertension. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

persistent pulmonary hypertension of newborn (P29.30)
pulmonary hypertension NOS (I27.20)
secondary pulmonary arterial hypertension (I27.21)
secondary pulmonary hypertension (I27.29)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Heritable pulmonary arterial hypertension
Idiopathic pulmonary arterial hypertension
Primary group 1 pulmonary hypertension
Primary pulmonary arterial hypertension

Risk adjustment

I27.0 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 226 Heart Failure, Except End Stage and Acute0.360 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

I27.0 is named in 36 Medicare coverage policies — 36 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52466Nebulizers - Policy Article
A52466Nebulizers - Policy Article
A52466Nebulizers - Policy Article
A52466Nebulizers - Policy Article

How I27.0 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I27.0.

Arrillaga-Ayerza syndrome(pulmonary sclerosis with pulmonary hypertension)
Ayerza's disease or syndrome(pulmonary artery sclerosis with pulmonary hypertension)
Cardiopathia nigra
Arteriosclerosis, arteriosclerotic›pulmonary(idiopathic)
Disease, diseased›Ayerza's(pulmonary artery sclerosis with pulmonary hypertension)
Hypertension, hypertensive›lesser circulation
Syndrome›Arrillaga-Ayerza
Syndrome›Ayerza(-Arrillaga)
Syndrome›cardiacos negros
Disease, diseased›heart›black
Hypertension, hypertensive›pulmonary›primary(idiopathic)
Sclerosis, sclerotic›pulmonary›artery

Related codes at this level

Codes that share I27. If I27.0 is not quite right, the correct code is usually one of these.

Questions about I27.0

Is I27.0 a billable ICD-10-CM code?: Yes. I27.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I27.0 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Pulmonary heart disease and diseases of pulmonary circulation (I26-I28).
What cannot be coded together with I27.0?: I27.0 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.