The juvenile court or the circuit court may cause any juvenile within its jurisdiction under the provisions of this law to be physically examined and treated by a physician or to be examined and treated at a local mental health center. If no such appropriate facility is available locally, the court may order the juvenile to be examined and treated by any physician or psychiatrist or examined by a clinical psychologist. The Commissioner of Behavioral Health and Developmental Services shall provide for distribution a list of appropriate mental health centers available throughout the Commonwealth. Upon the written recommendation of the person examining the juvenile that an adequate evaluation of the juvenile’s treatment needs can only be performed in an inpatient hospital setting, the court shall have the power to send any such juvenile to a state mental hospital for not more than 10 days for the purpose of obtaining a recommendation for the treatment of the juvenile. No juvenile sent to a state mental hospital pursuant to this provision shall be held or cared for in any maximum security unit where adults determined to be criminally insane reside; the juvenile shall be kept separate and apart from such adults. However, the Commissioner of Behavioral Health and Developmental Services may place a juvenile who has been certified to the circuit court for trial as an adult pursuant to § 16.1-269.6 or 16.1-270 or who has been convicted as an adult of a felony in the circuit court in a unit appropriate for the care and treatment of persons under a criminal charge when, in his discretion, such placement is necessary to protect the security or safety of other patients, staff or the public. Whenever the parent or other person responsible for the care and support of a juvenile is determined by the court to be financially unable to pay the costs of such examination as ordered by the juvenile court or the circuit court, such costs may be paid according to procedures and rates adopted by the Department from funds appropriated in the general appropriation act for the Department. The juvenile court or the circuit court may cause any juvenile within its jurisdiction who is found to be delinquent for an offense that is eligible for commitment pursuant to subdivision A 14 of § 16.1-278.8 or § 16.1-285.1 to be placed in the temporary custody of the Department of Juvenile Justice for a period of time not to exceed 30 days for diagnostic assessment services after the adjudicatory hearing and prior to final disposition of his or her case. Prior to such a placement, the Department shall determine that the personnel, services and space are available in the appropriate correctional facility for the care, supervision and study of such juvenile and that the juvenile’s case is appropriate for referral for diagnostic services. Whenever a juvenile concerning whom a petition has been filed appears to be in need of nursing, medical or surgical care, the juvenile court or the circuit court may order the parent or other person responsible for the care and support of the juvenile to provide such care in a hospital or otherwise and to pay the expenses thereof. If the parent or other person is unable or fails to provide such care, the juvenile court or the circuit court may refer the matter to the authority designated in accordance with law for the determination of eligibility for such services in the county or city in which such juvenile or his parents have residence or legal domicile. In any such case, if a parent who is able to do so fails or refuses to comply with the order, the juvenile court or the circuit court may proceed against him as for contempt or may proceed against him for nonsupport.