Type 1 or 2 diabetes

FPG \> 125 mg/dl or \< 105mg/dl at screening blood draw

HbA1C \> 6.4 or \< 5.7 at screening blood draw

Systolic blood pressure \> 210 mmHg at the baseline clinic visit

Exercise ≥ 30 minutes/day, at least five days a week

Current participation in another structured weight loss treatment program or another intervention study

Severe concurrent disease

Unavailable for the 24-week study period

Unable to read or speak English

Pregnant or planning to become pregnant.

Mentally or legally incapacitated such that informed consent cannot be obtained.

Call-2-Health: Preventing Type II Diabetes