2026 ICD-10-CM Diagnosis Code N06.22Secondary membranous nephropathy with isolated proteinuria
ICD-10-CM Codes›N00–N99›N00-N08›N06
- Billable — Valid for Submission
- Chronic Condition
N06.22 is a billable ICD-10-CM diagnosis code for secondary membranous nephropathy with isolated proteinuria. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nephritis; nephrosis; renal sclerosis and Proteinuria.
Code Identity
Code Classification
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Secondary membranous nephropathy, NOS
Code First
- , if applicable, other disease or disorder or poisoning causing membranous nephropathy
Use Additional Code
- code, if applicable, for adverse effect of drug causing membranous nephropathy
Type 1 Excludes
- secondary membranous nephropathy with nephrotic syndrome N04.22
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Nephropathy - See Also: Nephritis; - N28.9
- membranous (diffuse) - N06.20
- secondary - N06.22
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Nephropathy
- membranous (diffuse)
- secondary
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Code History & ChangesHistory
Replacement N06.22 replaces the following previously assigned code(s):
- N06.2 - Isolated proteinuria w diffuse membranous glomerulonephritis
Questions About N06.22Overview
Is N06.22 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report secondary membranous nephropathy with isolated proteinuria on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does N06.22 group to?
When secondary membranous nephropathy with isolated proteinuria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
