Your Stanford-sponsored H-1B allows you to work only at the location specified on your H-1B petition. Don't accept any other employment other than the employment approved under your most recent H-1B petition.
If there are any substantial changes to your job duties, hours, title, department or work location please have your department notify the I-Center immediately.
Do not engage in clinical research or patient contact unless your H-1B petition was approved for such duties. If it wasn't approved for clinical duties, your department must initiate an amendment with the I-Center and you may not begin your clinical duties until the petition has been received by the USCIS.