Colorado Stem Cell Centers

Colorado Stem Cell Centers is a regenerative orthopedic and pain practice in Greenwood Village, in the Denver metro area.

Clinicians

• Jack Rentz, MD — board certified in anesthesia and pain medicine, per the site
• Robert J. Bess, MD, FACS — orthopedic, trauma and spine surgeon

Regenerative treatments offered

• Lipogems — fat-derived (adipose) tissue injections
• Bone marrow aspirate concentrate (BMAC)
• Platelet-rich plasma (PRP)
• Alpha-2-macroglobulin (A2M) and amnion injections

Conditions the practice lists

Shoulder, wrist, elbow, hip, knee, ankle and foot joints; spine conditions; soft tissue injuries; tendonitis; tennis elbow; arthritic and injured cartilage; neck, back, arm, hip and leg pain.

What to know before you call

• Evaluation is in person; the site states procedures are typically completed within 1–2 hours.
• A patient-candidate page, new-patient forms and a financing page are available on the site.
• Prices are not published; insurance is not addressed on the pages reviewed.
• Phone: 303-788-5230.

RPG verification notes

• Physician names and specialties listed on the Board Certified Physicians page.
• No FDA disclaimer seen on the conditions page.
• Prices not published.

Last verified by Regen Provider Guide: October 2026. Confirm treatment details, candidacy, insurance coverage and costs directly with the practice.