I12.9 — Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
I12.9 is a billable, specific ICD-10-CM code for hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease. It is valid for submission on a claim.
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Add a secondary code to capture the detail described below.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Hypertensive chronic kidney disease NOS
- Hypertensive renal disease NOS
Excludes1 inherited from the categories above I12.9
These are not written on I12.9, but they bind it: a note on a category applies to every code beneath it. Billing I12.9 with anything listed here is a denial.
Excludes2 inherited from the categories above I12.9
Also inherited, and the opposite of Excludes1: these conditions are not part of I12.9, but a patient can have both, so you may code both.
Other codes that can never be billed with I12.9
These codes carry an Excludes1 note pointing at I12.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I12.9 alone.
- N26Unspecified contracted kidney
Risk adjustment
I12.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
I12.9 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.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A53026Billing and Coding: Bariatric Surgery Coverage
- A54923Billing and Coding: Bariatric Surgery for Treatment of Co-Morbidities Conditions Related to Morbid Obesity
- A55336Billing and Coding: Retroperitoneal Ultrasound
How I12.9 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 I12.9.
- Hypertension, hypertensive›kidney
- Hypertension, hypertensive›kidney›with›stage 1 through stage 4 chronic kidney disease
The condition this code belongs to
Every code for the condition on one page, which one applies when, and the mistake coders make with it.
Code history
I12.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share I12. If I12.9 is not quite right, the correct code is usually one of these.
Questions about I12.9
- Is I12.9 a billable ICD-10-CM code?
- Yes. I12.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I12.9 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Hypertensive diseases (I10-I1A).
- What cannot be coded together with I12.9?
- I12.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I12.9 (I12) and apply to it just the same.