Loss Of Consciousness ICD-10-CM Codes

Loss Of Consciousness ICD-10-CM Codes

Learn about the ICD-10 codes used for loss of consciousness through this guide.

By Matt Olivares on Aug 8, 2025.

Fact Checked by Gale Alagos.

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What ICD-10 codes are used for loss of consciousness?

Loss of consciousness (LOC) is a serious medical condition that requires immediate attention. Accurate coding is vital for both diagnosis and treatment, as well as for medical record-keeping and billing. ICD-10-CM offers specific codes to classify various types of LOC, helping healthcare providers to document and manage these cases effectively.

Here are some commonly used related ICD-10-CM codes for loss of consciousness:

  • R40.20 - Unspecified coma: This code is used when a person is in a coma, but the specific type or cause is not known.
  • R40.1 - Stupor: This code is for cases where the person is unresponsive but can be aroused by strong stimuli.
  • R40.3 - Persistent vegetative state: This code is for prolonged unconsciousness where the person shows no awareness of the environment.
  • R40.4 - Transient alteration of awareness: This code is used for brief periods of altered consciousness not classified as fainting.
  • S06.0X9A - Concussion with loss of consciousness of unspecified duration, initial encounter: This is meant to be used if the patient is confirmed to have a concussion and has been unconscious for an unspecified duration. Use S06.0X9D for subsequent encounters and S06.0X9S for sequela.

Which loss of consciousness ICD codes are billable?

All of the aforementioned ICD-10-CM codes for loss of consciousness are valid and billable.

Clinical information

  • Loss of consciousness is often a sign of a serious underlying medical issue.
  • Immediate medical evaluation is essential, usually involving imaging tests and neurological assessments.
  • Causes can range from low blood sugar to serious brain injuries prior to the loss of consciousness.
  • Treatment varies based on the underlying cause and may include medications, surgery, or supportive care to help with regaining consciousness.
  • Monitoring is crucial for detecting any changes in consciousness levels or neurological function.

Synonyms include

  • Unconsciousness
  • Blackout
  • Coma
  • Fainting
  • Passing out
  • Unconsciousness with an unspecified duration
  • Unconsciousness due to traumatic brain injury
  • Brain injury with loss of consciousness

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Commonly asked questions

ICD-10-CM codes for loss of consciousness should be used for medical documentation, clinical diagnosis, and billing. They are essential for accurate record-keeping and aid in developing an appropriate treatment plan.

Treatments depend on the underlying cause. It may involve stabilizing the patient, administering medications to treat the underlying condition, or surgical intervention for severe cases like brain injury.

A diagnosis code for loss of consciousness categorizes the condition based on its severity and nature. It is a standardized language for healthcare providers and is crucial for billing and statistical purposes.

Related ICDs

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