Holyoke Medical Group Patient Portal. Health (9 days ago) The Holyoke Medical Center (HMC) Patient Portal is a secure way for patients to access their LABS and hospital information through the internet at www.holyokehealth.com.If you have not obtained a medical record number from the lab at the time of your appointment, you will need to call 413-534-2500 and ask to speak to Medical Records..