R161 - Enlarged spleen that doesn't fit into other specific categories

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 spleen is larger than normal (splenomegaly). The spleen is an organ located in your upper left abdomen that helps filter your blood and fight infections. When it becomes enlarged, it can be due to various reasons such as infections, blood disorders, liver problems, or other medical conditions. The 'not elsewhere classified' part means that your enlarged spleen doesn't fit into other more specific diagnostic categories, so doctors are using this general code while they work to determine the underlying cause. An enlarged spleen may cause discomfort in your left upper abdomen, early feeling of fullness when eating, or sometimes no symptoms at all.

Additional Information

This is a symptom or finding rather than a final diagnosis. Further investigation is typically needed to determine what is causing the spleen enlargement. The associated MRI/MRA imaging suggests doctors are using advanced imaging to evaluate the spleen and surrounding structures.

Category

Diagnostic Finding

Medical Specialty

Internal Medicine, Hematology, Gastroenterology

Expected Costs

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

What's Required Before This

  • Physical examination
  • Medical history review
  • Often requires imaging studies like ultrasound, CT, or MRI

What to Expect After

  • Additional testing to determine underlying cause
  • Blood work including complete blood count
  • Possible specialist referral
  • Monitoring of spleen size
  • Treatment of underlying condition

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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