ICD-10-CM
ICD-10 code for Pulmonary hypertension: I27.20
The CDC title for "Pulmonary hypertension" is I27.2 (Other secondary pulmonary hypertension), a header that is not billable. When nothing more specific is documented, the billable code is I27.20, Pulmonary hypertension, unspecified.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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Codes under I27.2, then other CDC titles that name pulmonary hypertension
A header groups codes and is not billed. A billable code is one you can report.
- I27.2Other secondary pulmonary hypertensionHeader
- I27.20Pulmonary hypertension, unspecifiedBillable
- I27.21Secondary pulmonary arterial hypertensionBillable
- I27.22Pulmonary hypertension due to left heart diseaseBillable
- I27.23Pulmonary hypertension due to lung diseases and hypoxiaBillable
- I27.24Chronic thromboembolic pulmonary hypertensionBillable
- I27.29Other secondary pulmonary hypertensionBillable
- I27.0Primary pulmonary hypertensionBillable
- P29.30Pulmonary hypertension of newbornBillable
Code also
The CDC tabular list says a second code may be needed with this one. The note does not set which is listed first.
From I27.2. A note on a category applies to every code under it.
Code also associated underlying condition
Excludes1
Excludes1 means these codes are not reported together.
From I27.2. A note on a category applies to every code under it.
Related conditions
Related pages
- I27.20 code detailsNotes, nearby codes, CMS-HCC group
- Category I27.2Every code under it
- Chapter 9Diseases of the circulatory system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Pulmonary hypertension?
The CDC title for "Pulmonary hypertension" is I27.2 (Other secondary pulmonary hypertension), a header that is not billable. When nothing more specific is documented, the billable code is I27.20, Pulmonary hypertension, unspecified.
Is I27.20 billable?
Yes. I27.20 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to I27.20?
The CDC tabular list gives 1 Excludes1 note (not coded together) for I27.20 and the categories above it. They are listed on this page.
What chapter is I27.20 in?
Chapter 9. Diseases of the circulatory system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.