Hypertensive chronic kidney disease (I12) ICD-10-CM
The I12 code range covers hypertensive chronic kidney disease with 3 ICD-10-CM diagnosis codes. 2 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- any condition in N18 N26
- arteriosclerosis of kidney
- arteriosclerotic nephritis (chronic) (interstitial)
- hypertensive nephropathy
- nephrosclerosis
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- hypertension due to kidney disease I15.0 I15.1
- renovascular hypertension I15.0
- secondary hypertension I15
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- acute kidney failure N17
Codes in the I12 Range 3 codes · 2 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I12 range.
Nephrosclerosis
Hardening of the KIDNEY due to infiltration by fibrous connective tissue (FIBROSIS), usually caused by renovascular diseases or chronic HYPERTENSION. Nephrosclerosis leads to renal ISCHEMIA.
About the I12 Code Range
Hypertensive chronic kidney disease codes in the I12 category are used to identify kidney damage caused by long-term high blood pressure. These codes distinguish between different stages of chronic kidney disease linked to hypertension, helping to specify the severity of the patient's condition.
The main code I12 covers hypertensive chronic kidney disease broadly. More detailed codes like I12.0 indicate hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease (ESRD), which is also called “end stage renal failure due to hypertension” or “hypertensive renal failure.” This code includes situations where dialysis is required due to hypertension-related kidney failure. The code I12.9 refers to hypertensive chronic kidney disease with stage 1 through 4 chronic kidney disease, or unspecified stages, covering terms such as “chronic kidney disease due to benign hypertension,” “renal hypertension,” and “nephrosclerosis.” These codes specifically support accurate documentation and coding of kidney disease complications arising from hypertension, which is vital for treatment planning and reporting.
Questions About This Page
How many billable codes are in the I12 range?
Of the 3 codes in this range, 2 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the I12 range classify?
The range classifies hypertensive chronic kidney disease. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
