I12 – Hypertensive chronic kidney disease

ICD-10-CM 2027 diagnosis code · Hypertensive diseases

Non-billable header

ICD-10-CM code I12
Code
I12 (claims format: I12)
Description
Hypertensive chronic kidney disease
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
9. Diseases of the circulatory system (I00-I99)
Block
I10-I1A Hypertensive diseases

Billable codes under I12

I12 is a header code and cannot be used on claims. Choose the most specific code:

Notes for I12

Includes:
  • any condition in N18 and N26 - due to hypertension
  • arteriosclerosis of kidney
  • arteriosclerotic nephritis (chronic) (interstitial)
  • hypertensive nephropathy
  • nephrosclerosis
Excludes1 (not coded here):
  • hypertension due to kidney disease (I15.0, I15.1)
  • renovascular hypertension (I15.0)
  • secondary hypertension (I15.-)
Excludes2 (not included here):
  • acute kidney failure (N17.-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block I10-I1A

Excludes1 (not coded here):
  • neonatal hypertension (P29.2)
  • primary pulmonary hypertension (I27.0)
Excludes2 (not included here):
  • 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)

Index terms for I12

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code I12?

I12 is the ICD-10-CM code for hypertensive chronic kidney disease, in the block I10-I1A (Hypertensive diseases).

Is I12 a billable code?

No. I12 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.