N19 ICD-10-CM Code: Unspecified kidney failure
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the genitourinary system (N00-N99) / Acute kidney failure and chronic kidney disease (N17-N19)
N19
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceUnspecified kidney failure
Unspecified kidney failure refers to loss of kidney function where the cause or type (acute vs. chronic) has not been specified in the medical record.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Uremia NOS
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for N19 in this effective period.
Related Child Codes
ICD-10-CM does not list child codes under N19 for this display context.
Includes
OfficialICD-10-CM does not list Includes notes for N19 in this effective period.
Excludes 1
Official- acute kidney failure (N17.-)
- chronic kidney disease (N18.-)
- chronic uremia (N18.9)
- extrarenal uremia (R39.2)
- prerenal uremia (R39.2)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for N19 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for N19 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for N19 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is N19 an HCC code?
No. N19 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- N19
- Description
- Unspecified kidney failure
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
N19 is the ICD-10-CM diagnosis code for unspecified kidney failure. Unspecified kidney failure refers to loss of kidney function where the cause or type (acute vs. chronic) has not been specified in the medical record. N19 sits in the ICD-10-CM chapter for diseases of the genitourinary system (n00-n99), within the section covering acute kidney failure and chronic kidney disease (n17-n19).
N19 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This is a non-specific code; attempt to determine if the failure is acute (N17) or chronic (N18) before using N19.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for N19 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.