ICD Code N18.3

ICD code N18.3 is used to classify and document the diagnosis of chronic kidney disease at stage 3, which is considered moderate. This stage indicates that the kidneys are moderately damaged and are not functioning at full capacity, with a glomerular filtration rate (GFR) typically between 30 and 59 mL/min/1.73 m². This code helps healthcare providers communicate the severity of the kidney disease for treatment planning, billing, and statistical purposes.

1. Glomerular Filtration Rate (GFR) Assessment: Use the ICD code when the patient's estimated Glomerular Filtration Rate (eGFR) consistently falls between 30 to 59 mL/min/1.73 m², indicating moderate reduction in kidney function.

2. Persistent Proteinuria: Document the presence of protein in the urine over a period of time, which may be indicative of kidney damage and supports the use of this ICD code.

3. Elevated Serum Creatinine Levels: Utilize the ICD code when there is a consistent elevation in serum creatinine levels, reflecting impaired kidney function.

4. Hypertension: Consider the ICD code if the patient has a history of hypertension, which is often associated with chronic kidney disease progression.

5. Anemia: Use the ICD code if the patient presents with anemia, a common complication of chronic kidney disease due to decreased erythropoietin production by the kidneys.

6. Electrolyte Imbalance: Document any persistent electrolyte imbalances, such as hyperkalemia or hypocalcemia, which may occur as kidney function declines.

7. Bone Mineral Disorder: Consider the ICD code if there is evidence of renal osteodystrophy or other bone mineral disorders, which are complications of chronic kidney disease.

8. Fatigue and Weakness: Use the ICD code if the patient frequently reports symptoms of fatigue and weakness, which are common in moderate chronic kidney disease.

9. Swelling or Edema: Document any instances of swelling or edema, particularly in the lower extremities, which can be a symptom of declining kidney function.

10. Uremic Symptoms: Consider the ICD code if the patient exhibits symptoms of uremia, such as nausea, vomiting, or confusion, indicating a buildup of waste products in the blood due to reduced kidney function.

For the ICD code N18.3, which corresponds to chronic kidney disease, stage 3 (moderate), the relevant CPT codes that may be applicable for treatment and management include:

1. CPT 99201-99215: These codes are used for evaluation and management (E/M) services provided by physicians or other qualified healthcare professionals. The specific code within this range depends on the complexity and time of the visit.

2. CPT 90945-90947: These codes are used for dialysis services, which may be relevant for patients with chronic kidney disease.

3. CPT 80047-80076: These codes cover basic metabolic panels and comprehensive metabolic panels, which are often used to monitor kidney function and electrolyte balance.

4. CPT 82565: This code is used for the measurement of creatinine levels in the blood, an important test for assessing kidney function.

5. CPT 84132: This code is used for the measurement of serum potassium levels, which is crucial for patients with kidney disease.

6. CPT 85025: This code is used for a complete blood count (CBC) with differential, which can help monitor overall health and detect potential complications.

7. CPT 84443: This code is used for thyroid-stimulating hormone (TSH) testing, as thyroid function can impact kidney health.

These CPT codes are examples of the types of services that may be relevant for managing and treating chronic kidney disease, stage 3, as indicated by ICD code N18.3. The specific codes used will depend on the individual patient's treatment plan and the services provided.

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