Where is the corporate office of petersen health care located? The corporate office is located in Peoria, IL. As of the end of 2015, Petersen Health Care was the 18th largest nursing home chain in the country based on the number of beds in its facilities. At that time, Petersen controlled 102 nursing homes and had annual operating revenue exceeding $300 million.How do i make an appointment at the peterson health clinic? The 21st Medical Group operates the Peterson Health Clinic at Peterson AFB. Appointments can be made during business hours by calling the Main Line and using option 1. The Pharmacy can be reached by using option 2.What is the phone number for peterson regional hospital? Main Hospital Number. (830) 896-4200. Peterson Regional Ambulatory Care Center. (830) 258-7208. Patient Rooms. Dial (830) 258-2 + room number.What is the mental health clinic at peterson? The Mental Health Clinic at Peterson offers a wide variety of behavioral health services to support inpiduals, families, and the military mission. Schriever Clinic offers limited outpatient counseling services augmented by services housed on Peterson. Active duty personnel and/or Guard/Reserve members on Title V orders have priority.