N03.1 is the authoritative medical code for Chronic nephritic syndrome with focal and segmental glomerular lesions. This classification is used in medical billing and clinical recording to specify the clinical criteria for chronic nephritic syndrome with focal and segmental glomerular lesions (ICD-10-CM N03.1), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Chronic nephritic syndrome with focal and segmental glomerular lesions is a billable ICD-10-CM diagnosis code N03.1. Includes: chronic glomerular disease; chronic glomerulonephritis; chronic nephritis. Inclusion terms: Chronic nephritic syndrome with focal and segmental hyalinosis; Chronic nephritic syndrome with focal and segmental sclerosis; Chronic nephritic syndrome with focal glomerulonephritis. Excludes1 (not coded here): chronic tubulo-interstitial nephritis N11.-; diffuse sclerosing glomerulonephritis N05.8-; nephritic syndrome NOS N05.-; hypertensive chronic kidney disease I12.-. Code also: any associated kidney failure N17-N19..
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for N03.1 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- chronic glomerular disease
- chronic glomerulonephritis
- chronic nephritis
Inclusion Terms
Alternative terms the tabular list files under this code.
- Chronic nephritic syndrome with focal and segmental hyalinosis
- Chronic nephritic syndrome with focal and segmental sclerosis
- Chronic nephritic syndrome with focal glomerulonephritis
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- chronic tubulo-interstitial nephritis N11.-
- diffuse sclerosing glomerulonephritis N05.8-
- nephritic syndrome NOS N05.-
- hypertensive chronic kidney disease I12.-
Code Also
Additional codes that may be required to fully describe the encounter.
- any associated kidney failure N17-N19.
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with N03.1?
Per Excludes1 instructions, N03.1 must not be reported with: chronic tubulo-interstitial nephritis (N11.-); diffuse sclerosing glomerulonephritis (N05.8-); nephritic syndrome NOS (N05.-); hypertensive chronic kidney disease (I12.-).
What conditions are included under N03.1?
Chronic nephritic syndrome with focal and segmental glomerular lesions includes: Chronic nephritic syndrome with focal and segmental hyalinosis; Chronic nephritic syndrome with focal and segmental sclerosis; Chronic nephritic syndrome with focal glomerulonephritis.
Codes in This Family (11)
Official ICD-10-CM classifications in the same code family as N03.1, with their registry titles.
- N03 — Chronic nephritic syndrome
- N03.0 — Chronic nephritic syndrome with minor glomerular abnormality
- N03.2 — Chronic nephritic syndrome with diffuse membranous glomerulonephritis
- N03.3 — Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
- N03.4 — Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
- N03.5 — Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
- N03.6 — Chronic nephritic syndrome with dense deposit disease
- N03.7 — Chronic nephritic syndrome with diffuse crescentic glomerulonephritis
- N03.8 — Chronic nephritic syndrome with other morphologic changes
- N03.9 — Chronic nephritic syndrome with unspecified morphologic changes
- N03.A — Chronic nephritic syndrome with C3 glomerulonephritis
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic), chronic, with, focal and segmental glomerular lesions
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code N00.1
Acute nephritic syndrome with focal and segmental glomerular lesions
ICD Code N01.1
Rapidly progressive nephritic syndrome with focal and segmental glomerular lesions
ICD Code N02.1
Recurrent and persistent hematuria with focal and segmental glomerular lesions
ICD Code N04.1
Nephrotic syndrome with focal and segmental glomerular lesions
ICD Code N05.1
Unspecified nephritic syndrome with focal and segmental glomerular lesions
ICD Code N06.1
Isolated proteinuria with focal and segmental glomerular lesions
ICD Code N07.1
Hereditary nephropathy, not elsewhere classified with focal and segmental glomerular lesions