Idaho Subscriber
Answer: According to a Sept. 25, 2001, memorandum from CMS to intermediaries and carriers, contractors should not install edits that result in the automatic denial of services based solely on the ICD-9 codes for dementia. When a beneficiary with dementia has an illness or injury unrelated to his dementia, the provider should submit a claim with a primary diagnosis that most accurately reflects the need for the provided services.
Therefore, the pulmonologist would use the more general 780.5 (sleep disturbances) until the results of a sleep study are known, or 780.53 (sleep disturbances, hypersomnia with sleep apnea). Code 331.0 (Alzheimers disease) should not be used.