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.
Always good visit. He takes the time to carefully explain everything. He’s the best!!
(4 days ago)
Sep-2026
Professional and kind
(5 days ago)
Sep-2026
A medical professional. Answered all my questions. Treated my disease successfully when others had no clue.
(6 days ago)
Sep-2026
You just have that feeling he cares about the people that he has for patient.
(1 week ago)
Sep-2026
Explain what my body is doing
(1 week ago)
Sep-2026
Always a five star. He is a great doctor and he listens.Happy with the results!!
(1 week ago)
Sep-2026
The best doctor in Lake Havasu City, AZ
(2 weeks ago)
Sep-2026
Dr. Premaratne is always thorough, clear explaining, speaks on a comfortable presentation to me . . even when I dig my feet in. He's great!
(2 weeks ago)
Sep-2026
Very excited and happy with Doc Raj, I finally found the right rheumatologist!! So stoked!!
(2 weeks ago)
Sep-2026
Dr. Raj is a very kind and caring physician. He gives the opportunity for patient to ask questions and checks to make sure all their questions are answered.
(2 weeks ago)
Sep-2026
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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.
Always good visit. He takes the time to carefully explain everything. He’s the best!!
Professional and kind
A medical professional. Answered all my questions. Treated my disease successfully when others had no clue.
You just have that feeling he cares about the people that he has for patient.
Explain what my body is doing
Always a five star. He is a great doctor and he listens.Happy with the results!!
The best doctor in Lake Havasu City, AZ
Dr. Premaratne is always thorough, clear explaining, speaks on a comfortable presentation to me . . even when I dig my feet in. He's great!
Very excited and happy with Doc Raj, I finally found the right rheumatologist!! So stoked!!
Dr. Raj is a very kind and caring physician. He gives the opportunity for patient to ask questions and checks to make sure all their questions are answered.