Is N08 a billable ICD-10-CM code?

Yes. N08 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does N08 sit in the tabular list?

Diseases of the genitourinary system (N00-N99), in the block Glomerular diseases (N00-N08).

What cannot be coded together with N08?

N08 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

N08

N08 — Glomerular disorders in diseases classified elsewhere

Billable / specific codeICD-10-CM

N08 is a billable, specific ICD-10-CM code for glomerular disorders in diseases classified elsewhere. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

glomerulonephritis, nephritis and nephropathy (in):
antiglomerular basement membrane disease (M31.0)
diabetes (E08-E13 with .21)
gonococcal (A54.21)
Goodpasture's syndrome (M31.0)
hemolytic-uremic syndrome (D59.3-)
lupus (M32.14)
mumps (B26.83)
syphilis (A52.75)
systemic lupus erythematosus (M32.14)
Wegener's granulomatosis (M31.31)
pyelonephritis in diseases classified elsewhere (N16)
renal tubulo-interstitial disorders classified elsewhere (N16)

Code first

The underlying condition must be sequenced before this code.

underlying disease, such as:
amyloidosis (E85.-)
congenital syphilis (A50.5)
cryoglobulinemia (D89.1)
disseminated intravascular coagulation (D65)
gout (M1A.-, M10.-)
microscopic polyangiitis (M31.7)
multiple myeloma (C90.0-)
sepsis (A40.0-A41.9)
sickle-cell disease (D57.0-D57.8)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Glomerulonephritis
Nephritis
Nephropathy

Risk adjustment

N08 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

N08 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A55336Billing and Coding: Retroperitoneal Ultrasound
A55639Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions
A56380Billing and Coding: Rituximab
A57189Billing and Coding: Serum Magnesium

Questions about N08

Is N08 a billable ICD-10-CM code?: Yes. N08 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does N08 sit in the tabular list?: Diseases of the genitourinary system (N00-N99), in the block Glomerular diseases (N00-N08).
What cannot be coded together with N08?: N08 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.