Obesity-hypoventilation syndrome (Pickwick syndrome)

ICD10 Diagnosis
Dx: Obesity-hypoventilation syndrome (Pickwick syndrome)
ICD10 code: E66.2
Pre-ICD10 counterpart: Sleep Apnea Syndrome
Charlson/ALERT Scale: none
APACHE Como Component: none
APACHE Acute Component: 2019-0: Metabolic/Renal NOS, 2019-0: Renal/Metabolic NOS
Start Date:
Stop Date:
External ICD10 Documentation

This diagnosis is a part of ICD10 collection.

  • SMW
    • 2019-01-01
    • 2999-12-31
    • E66.2
  • Cargo


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  • SMW
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Additional Info

  • This entity is a subset of obstructive sleep apnea, in which in addition to having apnea with hypercapnic episodes during sleep, these people also have hypercapnia while awake. As a result, these chronically hypercapnic patients generally have compensatory metabolic alkalosis (i.e. high serum bicarbonate to counteract the effect of the high pCO2 on blood pH).
  • The diagnosis is generally made based on: demonstrated sleep apnea, obesity, and daytime hypercapnia not explained by other disorders (e.g. severe COPD).
  • It's also called Pickwick Syndrome.

Alternate ICD10s to consider coding instead or in addition

Candidate Combined ICD10 codes

(put links to likely candidates coded with this one, eg. a cause for a trauma.)

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