I googled this information, but please double check the codes. Its a 2007 article that I copied it from. They may have been replaced. Hope it helps you.
House calls for Medicare patients
Q How should I code for a house call? Does it matter whether the patient is a Medicare beneficiary?
A Use CPT codes 99341-99350 to report a home visit. If the patient's home is a domiciliary, rest home or assisted living facility, you should report codes 99324-99337 rather than home visit codes.
The Medicare guidelines for payment for home visits may be more strict than other payers because you need to document why it was medically necessary for you to come to the patient's home rather than the patient coming to your office (e.g., traveling to the office would be painful or difficult for the patient).
Editor's note: While this department attempts to provide accurate information and useful advice, third-party payers may not accept the coding and documentation recommended. You should refer to the current CPT and ICD-9 manuals and the Documentation Guidelines for Evaluation and Management Services for the most detailed and up-to-date information.