top of page
i-LIMB Pulse

The Nextremity Difference

Prosthetic care has been relatively unchanged in the past few decades. Technology has increased, but other than that, little has been improved in regards to the way care is provided. At Nextremity, we take a patient centered approach to create the most transparent, educational, and enjoyable experience possible. Here are a few ways that we focus on our patients and their needs on our clinical care:

Telemedicine - People are busy, and for those who might have a hard time getting around, it can be costly and time consuming to arrange for a ride. That is why we provide the option of follow up care, and initial consultations via webconference with the patient on a smartphone, tablet, or laptop. 

Focus on Patient education - We believe that it is the amputee who often is the best person to direct their own care. At Nextremity, we focus on patient education, so they can better participate in the creation of their treatment plan. 

Transparent billing - Prosthetic care can be costly, and although we do our best to minimize this, we feel it is important for every patient to completely understand what they are receiving and how much it will cost them. 

Tested and Tried Prosthetic care - Every patient that is seen at Nextremity will be measured using many physical and social metrics before and after delivery of a device. We do this to prove any benefit that was provided, and to celebrate the improvements and success of our patients.

Enjoyable clinic experience - It is never enjoyable to spend time at a clinic, but we try to minimize the boredom by providing videos, books, games and other entertainment during the visit to help pass the time.

The NExtremity Difference
Our Services


Upper Limb Prosthetics


We are experienced in the most advanced technologies, but understand that thinking outside the box is the key when fitting upper limb prosthetics

Lower Limb Prosthetics


From microprocessor controlled prosthetic knees, to elevated vacuum systems, we believe in every patient receiveing customize care that is optimized for them alone.

3D printing and scanning


New to the field of prosthetics, we employ 3D printing in our clinical processes. We also utilize 3D scanning to achieve the optimal limb impression to improve comfort and function.


Currently unavailabel in the US, but recently FDA approved, osseointegration is a procedure of attaching the prosthesis directly to the bone. We consult on the pros and cons of this procedure.



We specialize in helping patients navigate the scary and lonely path following limb loss. We connect them with many specialists to help with recovery, and join them on appointments to make sure it is a smooth transition

Outcome Testing


We stand behind the quality of our work by testing every patient before and after fitting to prove that we are improving our patients' quality of life.


Years of Experience


American Board of certification Prosthetist


Clinicians with the heart of a teacher


Certified in Prosthetic & Orthotics

Who We Are

Lorin Merkley - Nextremity Prosthetic Design
Lorin Merkley

ABC Certified Prosthetist

Lorin has a passion for patient centered care, and enacting a true change in the lives of his patients. He has been in the orthotic and prosthetic industry for over 15 years. He graduated from Arizona State University in Biomedical engineering with an emphasis in biomechanics. He then went to Northwestern University to earn his certificate in prosthetics.

After practicing in Arizona, Lorin took a position as a founding faculty member in Baylor College of Medicine's new Orthotic and Prosthetic masters program. There he taught upper and lower limb prosthetics. It was also his responsibility to make sure that all clinical education met Baylor Standards. 


This unique background, along with a technical mind and a knack for technology, has prepared him for founding Nextremity Prosthetic Design. Here his patient centered focus is met with his interest in leveraging technology to create a more enjoyable, streamlined, and effective experience.

In his spare time, he loves spending every free moment with his wife, Kristyn, and his 6 energetic children. This family life has helped balance and round him out for a professional, yet comfortable and informal prosthetic practice experience.

Ryan Butler

ABC Certified Prosthetist Orthotist

While earning a bachelor’s in mechanical engineering, Ryan developed the technical know-how to solve problems and design solutions. Having a strong desire to help others, he soon discovered the field of O&P gave him the perfect opportunity to use these skills to improve the lives of those around him.  


After completing his bachelor’s at Brigham Young University, Ryan went on to earn a Master of Science degree in orthotics and prosthetics from Baylor College of Medicine. During his 5 years in the field of O&P, he has had the opportunity to work with active duty servicemen at the Naval Medical Center in San Diego, travel to Germany to work with O&P professionals in Europe, and see countless patients here locally.   


Ryan and his wife Kira enjoy staying active, traveling, and trying new things. They are anxiously awaiting their next big adventure— a second child, a baby girl due in September!

Our Team

A crossroads of amputees and their real and inspiring stories. Here you find the good, the bad, and the REAL life of being an amputee.

Nextremity Nexus


Our Address

9130 W Thomas Rd A105

Phoenix AZ 85037-3377

Tel: 1-800-311-5899

Fax: 866-710-3106

Open Hours

Please call for an appointment

Mon-Fri  9:00am-4:00pm


Contact Us
bottom of page