Not allowed. Here is a paste from AMA
Ethical questions have been raised about physicians who treat members of their own families. Incomplete physical examinations, medical records, and immunizations are undesirable consequences of physicians' treating their own children. The 1901 code of ethics of the American Medical Association (AMA) noted that a family member's illness tends to obscure the physician's judgement and produce patient timidity. In 1989, fearing financial abuse by unscrupulous providers, Medicare barred payment to physicians who care for "immediate family members."
Who counts as a family member? Medicare's list of "immediate relatives" includes spouses, parents, children, siblings, stepparents, stepchildren, stepbrothers, stepsisters, children-in-law, siblings-in-law, grandparents, grandchildren, and spouses of grandparents or grandchildren. Since 1989, Medicare has not paid for patient care charges by immediately related physicians, their associates or their professional corporations. Blue Cross—Blue Shield, which has a stricter definition of "family member," has not paid for these charges since 1976.