Patients → FAQs
Patient FAQs
Quick answers. If you don’t see it here, call (800) 977-3002.
What are your hours and when is 24/7 support available?+
Office hours are Mon–Thu 8:00–5:00 and Fri 7:00–4:00 Pacific. 24/7 emergency oxygen support is available outside those hours at (800) 977-3002.
How do I get resupply (filters, tubing, masks)?+
Call (800) 977-3002 or use the form on our Support page. You can also order many supplies direct via shop.diamondrx.com.
My concentrator is alarming — what do I do?+
Check power, tubing, and filters, note any display code, switch to backup if you have one, then call us with your model and code. See our Oxygen Concentrator Alarms guide for details.
Do you bill Medicare?+
Yes — Diamond is a Medicare-enrolled DME supplier. Coverage depends on qualifying criteria and documentation; call us to confirm benefits.
Can I pick up in Riverside?+
Yes — pickup is available at 1403 Palmyrita Ave, Riverside, CA 92507 during office hours.
Do you deliver and set up in my home?+
Yes — we deliver, set up, and teach in your home across Southern California.