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F51.19

Billable

Other hypersomnia not due to a substance or known physiological condition

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Excessive sleeping or daytime sleepiness that is not caused by medications, substances, or a known medical or mental health condition.

Coding Tips

  • •Use only after excluding sleep apnea, narcolepsy, and other organic causes
  • •This is a diagnosis of exclusion for primary hypersomnia

Code Hierarchy

└F51Sleep disorders not due to a substance or known physiological condition└F51.1Hypersomnia not due to a substance or known physiological condition└F51.19Other hypersomnia not due to a substance or known physiological condition
└F51.19Other hypersomnia not due to a substance or known physiological condition

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