ICD10 code of IgA nephropathy and ICD9 code

The ICD-10 code for IgA nephropathy is N02.8 (recurrent and persistent hematuria with focal glomerulonephritis), though it is frequently categorized under N04.8 (nephrotic syndrome) or N05.8 (unspecified nephritic syndrome) depending on clinical presentation. In the older ICD-9-CM classification system, IgA nephropathy was primarily coded as 583.2 (nephritis and nephropathy, not specified as acute or chronic, with lesion of proliferative glomerulonephritis).

What exactly is IgA nephropathy?

IgA nephropathy, also known as Berger’s disease, is a chronic autoimmune kidney disorder that occurs when immunoglobulin A (IgA)—an antibody that typically helps the body fight infections—deposits in the glomeruli. These are the tiny filtering units within the kidneys. Over time, the buildup of IgA nephropathy causes inflammation, which can impair the kidneys' ability to filter waste products from the blood. Currently, 347 people with IgA nephropathy are active in the DiseaseMaps community, sharing their personal experiences with symptom management and treatment journeys.

How do clinicians classify IgA nephropathy for billing and tracking?

While the ICD-10 code N02.8 is the most specific representation for the hematuric presentation of IgA nephropathy, medical coding is highly nuanced. Because IgA nephropathy manifests differently in every patient—ranging from asymptomatic microscopic hematuria to rapid-onset nephrotic syndrome—physicians may use a range of codes to reflect the patient's specific clinical status. Accurate coding is essential not only for insurance reimbursement but also for epidemiological tracking, which helps researchers better understand the global prevalence of IgA nephropathy.

What are the common clinical indicators of IgA nephropathy?

The progression of IgA nephropathy is often slow, sometimes spanning decades. Because many patients are asymptomatic in the early stages, the disease is frequently detected during routine physicals. Common clinical markers that lead to an IgA nephropathy diagnosis include:

• Hematuria: Persistent or recurrent blood in the urine, which may be visible (gross) or detectable only via microscope.


• Proteinuria: Excess protein in the urine, a sign that the kidney's filtering barrier is damaged.


• Hypertension: High blood pressure, which is both a common symptom and a factor that can accelerate the progression of IgA nephropathy.


• Edema: Swelling in the hands, feet, or around the eyes, particularly if the disease has progressed to nephrotic syndrome.


• Elevated Serum Creatinine: A laboratory finding indicating declining renal function.

Is there a genetic component to IgA nephropathy?

While IgA nephropathy is not considered a classic Mendelian hereditary disease, research indicates a strong genetic predisposition. Studies have identified several susceptibility loci, particularly within the major histocompatibility complex (MHC) region. However, environmental triggers and mucosal immune responses play a significant role in the development of IgA nephropathy, meaning that having a genetic marker does not guarantee the development of the condition.

Next steps

• Consult a Nephrologist: If you suspect you have symptoms of IgA nephropathy, request a referral to a nephrologist who specializes in glomerulonephritis.


• Monitor Your Data: Keep a detailed log of your blood pressure readings, protein-to-creatinine ratio in urine, and any changes in your medication regimen.


• Join the Community: Connect with the 347 members of the DiseaseMaps IgA nephropathy community to share experiences and learn about ongoing clinical trials.


• Review Guidelines: Familiarize yourself with the latest KDIGO (Kidney Disease: Improving Global Outcomes) clinical practice guidelines for the management of glomerulonephritis.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): IgA Nephropathy.


• Orphanet: IgA glomerulonephritis (ORPHA:26473).


• OMIM (Online Mendelian Inheritance in Man): IgA Nephropathy 1 (Entry #161950).


• Kidney Disease: Improving Global Outcomes (KDIGO) Clinical Practice Guidelines.