D.C. Code § 50-2206.52c

The results of chemical testing pertaining to blood or urine used to determine whether the person’s specimens contained alcohol or a drug or any combination thereof may be admissible as evidence in a criminal proceeding if the chemical testing was performed at a forensic laboratory, hospital, other equivalent medical facility, or at a laboratory contracted by a hospital or medical facility to perform chemical testing for specimens supplied by the hospital or equivalent medical facility.