Dr. Premaratne earned his medical degree from Riga Stradins University in Latvia before relocating to the United States for his medical training. He completed his Internal Medicine residency at St. John’s Mercy Medical Center in Saint Louis, Missouri, where he also served as junior faculty and Chief Resident.
Following his residency, Dr. Premaratne completed a rheumatology fellowship at the University of Kansas Medical Center. In 2012, he moved to Lake Havasu City, Arizona, to address the need for rheumatology care in Mohave County.
Dr. Premaratne earned his medical degree from Riga Stradins University in Latvia before relocating to the United States for his medical training. He completed his Internal Medicine residency at St. John’s Mercy Medical Center in Saint Louis, Missouri, where he also served as junior faculty and Chief Resident.
Following his residency, Dr. Premaratne completed a rheumatology fellowship at the University of Kansas Medical Center. In 2012, he moved to Lake Havasu City, Arizona, to address the need for rheumatology care in Mohave County.
The reviews listed below were collected independently of Arizona Arthritis & Rheumatology Associates through rater8. Each review represents an authentic and verified patient experience.
Spent quality time with me to explain everything and answer my questions.
(4 days ago)
Aug-2026
Dr Raj is terrific and his new staff seem friendly and knowledgeable.
(6 days ago)
Aug-2026
He is the best! Very personable, listens well, always to the point, and is very efficient!
(1 week ago)
Aug-2026
Love him! He will communicate with you and answer all your concerns and questions so you can understand everything.
He listens to your concerns and how you want your treatment
(1 week ago)
Aug-2026
No drugs. Had to reschedule
(1 week ago)
Aug-2026
Excellent care and staff is professional and patient care is their priority
(1 week ago)
Aug-2026
He listens, informs and cares.
(1 week ago)
Aug-2026
Caring, thorough, unrushed appointments
(1 week ago)
Aug-2026
Dr. Raj is a wonderful doctor!!! He will tell you straight how things are as well as listen to any questions or concerns you may have! 100% recommend
(2 weeks ago)
Aug-2026
AARA: Lake Havasu
2005 Injo Drive Suite 102 Lake Havasu, AZ 86403
Dr. Premaratne earned his medical degree from Riga Stradins University in Latvia before relocating to the United States for his medical training. He completed his Internal Medicine residency at St. John’s Mercy Medical Center in Saint Louis, Missouri, where he also served as junior faculty and Chief Resident.
Following his residency, Dr. Premaratne completed a rheumatology fellowship at the University of Kansas Medical Center. In 2012, he moved to Lake Havasu City, Arizona, to address the need for rheumatology care in Mohave County. He managed his own practice until merging with Arizona Arthritis & Rheumatology Associates (AARA) in August 2026.
Dr. Premaratne has also completed specialized training in musculoskeletal ultrasound-guided injections to improve patient diagnosis and outcomes. He currently maintains admitting privileges at Havasu Regional Medical Center, where he serves on the Board of Trustees.
In his spare time, Dr. Premaratne enjoys traveling with his family and participating in outdoor activities.
Spent quality time with me to explain everything and answer my questions.
Dr Raj is terrific and his new staff seem friendly and knowledgeable.
He is the best! Very personable, listens well, always to the point, and is very efficient!
Love him! He will communicate with you and answer all your concerns and questions so you can understand everything. He listens to your concerns and how you want your treatment
No drugs. Had to reschedule
Excellent care and staff is professional and patient care is their priority
He listens, informs and cares.
Caring, thorough, unrushed appointments
Dr. Raj is a wonderful doctor!!! He will tell you straight how things are as well as listen to any questions or concerns you may have! 100% recommend