About Us

Endocrinology and Diabetes Associates, LLC, comprised of Dr. Johnson and Dr. Cowart, provides care for a wide range of endocrine problems for adults 18 years and older.

Office Hours
  • Monday - Thursday: 8 AM to 5 PM
  • Friday: 8 AM to 12 PM
Phone Numbers
  • Phone: 256.551.4505
  • Fax: 256.551.4474
  • Endocrinology and Diabetes Associates, LLC
    201 Sivley Road STE 450
    Huntsville, AL 35801

We are located inside Huntsville Hospital's Blackwell Medical Tower. Click below for a more detailed map and driving directions.



If you are interested in seeing one of our doctors, please ask your primary care physician to download the referral form below and fax to our office. Once the referral form and all supporting documents are received by your physician, an appointment will be scheduled. Files are in PDF format and you will need Adobe Reader to view them.

New Patient Forms

These 3 forms are all you need if you are visiting our office for the first time:

Medical Records Requests
Patient Education

Only use these forms if you have seen the physician and a test has been ordered:

For Physicians

Download the latest version of Adobe Reader free of charge here:

Get Adobe Reader

Patient Portal

Our patient portal is a secure website that provides access to your lab results (if done at Huntsville Hospital or LabCorp) and record history with our practice.

Your username and password can be found on the back of your appointment card, or if you don't have a username and password, please contact the office at 256.551.4505 and one of our staff will be glad to help you with that information.