D72819 - Low white blood cell count of unknown cause

International Classification of Diseases

Last updated: 10/3/2025

What is a ICD-10 Code?

ICD-10 (International Classification of Diseases, 10th Revision) codes are used to classify and code all diagnoses, symptoms, and procedures recorded in association with hospital care. These codes provide a standardized way to track health conditions and their treatment outcomes.

Detailed Description

This code indicates that your white blood cell count is lower than normal, but the specific cause hasn't been identified yet. White blood cells are part of your immune system that help fight infections and diseases. When the count is low (a condition called leukopenia), your body may have a harder time fighting off infections. This could be due to various reasons including medications, infections, autoimmune conditions, bone marrow problems, or other medical conditions. Your healthcare team will likely need to do additional tests to determine the underlying cause and develop an appropriate treatment plan.

Additional Information

This is a diagnostic code used when low white blood cell count is documented but the specific cause hasn't been determined. The 'unspecified' designation means additional testing is typically needed to identify the root cause. Patients should follow up with their healthcare provider for further evaluation and monitoring.

Category

Blood and Immune System Disorders

Medical Specialty

Hematology/Internal Medicine

Expected Costs

Your actual cost will depend on your insurance coverage, provider location, and specific circumstances.

What's Required Before This

  • Complete blood count (CBC) test showing low white blood cell count
  • Medical evaluation to rule out specific causes

What to Expect After

  • Additional blood tests to monitor white blood cell levels
  • Further diagnostic testing to identify underlying cause
  • Possible referral to hematologist if cause remains unclear
  • Regular monitoring for signs of infection
  • Treatment of underlying condition once identified

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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