Billable / Specific Code
ICD-10-CM N04.21 is the diagnosis code for Primary membranous nephropathy with nephrotic syndrome. This code falls under the section "Glomerular diseases" within Chapter 14 — Diseases of the genitourinary system (N00-N99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where N04.21 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, N04.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
N04.21 is the ICD-10-CM diagnosis code for "Primary membranous nephropathy with nephrotic syndrome". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of N04.21 is N04.2 ("Nephrotic syndrome with diffuse membranous glomerulonephritis"). N04.21 provides a more specific classification within this category.
N04.21 is located in Section N00-N08 — "Glomerular diseases" within Chapter 14 of the ICD-10-CM Tabular List.
Use N04.21 when the patients documented diagnosis matches "Primary membranous nephropathy with nephrotic syndrome" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Primary membranous nephropathy with nephrotic syndrome is N04.21.
Yes, N04.21 can be used as a primary diagnosis code since it is billable and specific.
N04.21 is in Chapter 14 of the ICD-10-CM Tabular List.
Yes, N04.21 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.