Is ICD-10-CM code I15 billable?

No, I15 (Secondary hypertension) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code I15 belong to?

I15 belongs to Chapter 9 of the ICD-10-CM tabular list: I00–I99 (Diseases of the Circulatory System).

I15

Non-Billable

ChapterI00–I99

Rankcategory

Description

Secondary hypertension

About ICD-10-CM code I15

The ICD-10-CM tabular list places Secondary hypertension at code I15, inside I00-I99 Diseases of the Circulatory System, within Hypertensive diseases (I10-I1A). You should not submit this code on claims since it lacks billing specificity, use a child code.

Use a more specific code (5 billable)

I15.0Renovascular hypertension I15.1Hypertension secondary to other renal disorders I15.2Hypertension secondary to endocrine disorders I15.8Other secondary hypertension I15.9Secondary hypertension, unspecified

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 9: Diseases of the Circulatory System (I00-I99).

CH9 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
transient cerebral ischemic attacks and related syndromes (G45.-)

I10-I1A Parent Instructions

Excludes1(Not coded here. Use a different code.)

neonatal hypertension (P29.2)
primary pulmonary hypertension (I27.0)

Excludes2(Not included here. Code separately if applicable.)

hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)

Use Additional Code

code to identify:
exposure to environmental tobacco smoke (Z77.22)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Instructional Notes

Excludes1(Not coded here. Use a different code.)

postprocedural hypertension (I97.3)

Excludes2(Not included here. Code separately if applicable.)

secondary hypertension involving vessels of brain (I60-I69)
secondary hypertension involving vessels of eye (H35.0-)

Code Also

underlying condition

Clinical Hierarchy

BillableHas subcodes

CH9Diseases of the circulatory system (I00-I99)

I10-I1AHypertensive diseases (I10-I1A)

I15Secondary hypertensionNot billable

I15.0Renovascular hypertensionBillable

I15.1Hypertension secondary to other renal disordersBillable

I15.2Hypertension secondary to endocrine disordersBillable

I15.8Other secondary hypertensionBillable

I15.9Secondary hypertension, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I15:

blockI10-I1A

Hypertensive diseases (I10-I1A)

View context instructions

chapterCH9

Diseases of the circulatory system (I00-I99)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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