N05 — Unspecified nephritic syndrome

Not billable

Is N05 billable?

No — N05 is a non-billable header code. N05 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 11 billable codes beneath N05.

Billable codes under this header

N05 at a glance

Code	N05
Description	Unspecified nephritic syndrome
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with N05 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

nephropathy NOS with no stated morphological lesion (N28.9)
renal disease NOS with no stated morphological lesion (N28.9)
tubulo-interstitial nephritis NOS (N12)

Includes

Conditions classified to N05.

glomerular disease NOS
glomerulonephritis NOS
nephritis NOS
nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8

Excludes1 — never code together — inherited from N00-N08

The conditions below can never be reported together with N05 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

hypertensive chronic kidney disease (I12.-)

Excludes2 — not included here — inherited from Chapter 14

The conditions below are not part of N05, but a patient may have both at the same time. When documentation supports it, N05 and the excluded code may both be reported.

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Code also — inherited from N00-N08

Two codes may be needed to describe the condition fully. Whether N05 is sequenced first depends on the reason for the encounter.

any associated kidney failure (N17-N19).

What codes fall under N05? (11)

How long has N05 existed?

N05 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with N05?

ICD-10-CM declares these codes mutually exclusive with N05 — exactly one of each pair can be correct for a given encounter.