Watch: Why Insurance Companies Are Denying Coverage for Prosthetic Limbs Although knee replacements are usually covered by health insurance, amputees face roadblocks to coverage and often must prove their prosthetics are medically necessary. Previous article: Covid Worsened Shortages of Doctors and Nurses. Five Years On, Rural Hospitals Still Struggle. Prev Next article: KFF Health News' 'What the Health?': On Autism, It’s the Secretary’s Word vs. CDC’s Next