N03.8 ICD-10-CM Code: Chronic nephritic syndrome with other morphologic changes
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) / Glomerular diseases (N00-N08)
N03.8
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceChronic nephritic syndrome with other morphologic changes
A chronic kidney disease with inflammation and damage patterns that don't fit into the other specified categories of chronic nephritic syndrome.
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- Chronic nephritic syndrome with proliferative glomerulonephritis NOS
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for N03.8 in this effective period.
Related Child Codes
Includes
Official- chronic glomerular disease
- chronic glomerulonephritis
- chronic nephritis
Excludes 1
Official- chronic tubulo-interstitial nephritis (N11.-)
- diffuse sclerosing glomerulonephritis (N05.8-)
- nephritic syndrome NOS (N05.-)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for N03.8 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for N03.8 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for N03.8 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 N03.8 an HCC code?
No. N03.8 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- N03.8
- Description
- Chronic nephritic syndrome with other morphologic changes
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
N03.8 is the ICD-10-CM diagnosis code for chronic nephritic syndrome with other morphologic changes. A chronic kidney disease with inflammation and damage patterns that don't fit into the other specified categories of chronic nephritic syndrome. N03.8 sits in the ICD-10-CM chapter for diseases of the genitourinary system (n00-n99), within the section covering glomerular diseases (n00-n08).
N03.8 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.
Use this code only when the morphologic changes are documented but don't match N03.2 through N03.7.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for N03.8 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.