ICD-10-CM Billable Code

A36.84

Diphtheritic tubulo-interstitial nephropathy

Clinical Classification Guidelines

Medical Intelligence & Overview

Diphtheritic tubulo-interstitial nephropathy is a kidney condition that results from diphtheria, a serious bacterial infection. This form of nephropathy affects the tubules and interstitial tissue within the kidneys, leading to impairment in kidney function. Although rare, it highlights the importance of early diagnosis and treatment of diphtheria to prevent complications involving the kidneys.

Causes & Symptoms

Clinical Causes: Infection with Corynebacterium diphtheriae, the bacteria responsible for diphtheria The toxin produced by the bacteria causing damage to kidney tissues Delayed or inadequate treatment of diphtheria infection, allowing the bacteria to affect other organs Compromised immune system, which may make the kidneys more susceptible to damage

Key Symptoms: Signs of kidney impairment such as swelling in the legs, ankles, or face Decreased urine output or changes in urine appearance Fatigue and weakness due to toxin buildup in the body Fever and malaise possibly accompanying other diphtheria symptoms Abdominal discomfort or pain Potential development of high blood pressure

Diagnostic & Treatment

Diagnosis Path: History assessment of recent or past diphtheria infection Blood tests to evaluate kidney function, including serum creatinine and blood urea nitrogen (BUN) Urinalysis to detect abnormalities in urine, such as protein or blood Imaging studies like ultrasound to assess kidney size and structural integrity Biopsy of kidney tissue, in some cases, to confirm the extent and nature of kidney damage

Treatment Protocols: Administration of diphtheria antitoxin and antibiotics to eradicate bacterial infection Supportive care for kidney function such as dialysis in severe cases Managing fluid and electrolyte balance meticulously Controlling blood pressure through medications if elevated Monitoring kidney function regularly to assess recovery or progression Long-term follow-up to detect and manage any residual kidney impairment

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Advice & FAQs

Billing Guidance

Is A36.84 a billable ICD-10 code?
Yes, A36.84 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.

Documentation

How do I report A36.84?
Clinical documentation must specify the nature of Diphtheritic tubulo-interstitial nephropathy and any associated comorbidities for accurate reporting.

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