How long does it take for blood test (cbc, b12 and iron) results to come back. my daughter has been waiting over a week for hers after her previous test showing abnormalities?

These tests only take a few hours to perform, but then they are typically reviewed by the ordering physician before the results are released to the patient. If you have not gotten any results back after this holiday weekend, then a phone call to the physician's office would be appropriate. Good luck.

All of these tests are usually done the same day the specimen is received in the lab. Please note that you can sign up of electronic access to lab data and other medical records. Most labs release the results to the patient as soon as the result is completed. Visit this site for information and talk to your doctor: https://www.hhs.gov/hipaa/for-professionals/privacy/guidance/access/index.html