N06.9 — Isolated proteinuria with unspecified morphologic lesion

BillableUnspecified

Is N06.9 billable?

Yes, but N06.9 is an unspecified code. N06.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, N06.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting N06.9 — the more specific alternatives are listed below.

More specific alternatives

N06.9 at a glance

Code	N06.9
Description	Isolated proteinuria with unspecified morphologic lesion
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does N06.9 group to?

N06.9 sits in MDC 11 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

698Other Kidney and Urinary Tract Diagnoses with MCCmedical
699Other Kidney and Urinary Tract Diagnoses with CCmedical
700Other Kidney and Urinary Tract Diagnoses without CC/MCCmedical

How is N06.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to N06.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

Proteinuria › isolated › with glomerular lesion

Excludes1 — never code together — inherited from N00-N08

The conditions below can never be reported together with N06.9 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.-)

Excludes1 — never code together — inherited from N06

The conditions below can never be reported together with N06.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

Proteinuria not associated with specific morphologic lesions (R80.0)

Excludes2 — not included here — inherited from Chapter 14

The conditions below are not part of N06.9, but a patient may have both at the same time. When documentation supports it, N06.9 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 N06.9 is sequenced first depends on the reason for the encounter.

any associated kidney failure (N17-N19).

How long has N06.9 existed?

N06.9 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 conditions are coded to N06.9?

ICD-10 code for Proteinuria