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Dr. R. James Warren is double board-certified in pain medicine and anesthesiology. As the founder and president of Apollo Pain Management in Sun City Center, Florida, he treats a variety of pain conditions using a comprehensive, evidence-based medical approach which is personalized to each patient’s condition. He is also an Assistant Professor with the USF Pain Fellowship.

Dr. Warren was born in Kentucky and raised in the heartland of Columbus, Ohio. He attended the Ohio State University where he was president of the Society of Physics Students, and earned his BS in physics. Dr. Warren later attended graduate school at Case Western Reserve University, where he earned an MS in Neuroscience. He attended medical school at the University of Cincinnati, where he was appointed as the Cincinnati Academy of Medicine Liaison and Legislative Representative. He was awarded the Golden Scalpel Award for anatomical expertise, and earned his MD in 2002. In 2008, he completed his residency in Anesthesiology at SUNY Buffalo, during which his training was interrupted while he served a tour of duty for Operation Iraqi Freedom.

After residency, Dr. Warren practiced as an anesthesiologist for over 10 years. During this time, he held several key leadership positions, including Chair of Anesthesiology at Doctors Hospital of Michigan in Detroit, and served on the Pharmacy & Therapeutics Committee at Town & Country Hospital in Tampa. He also completed the Baycare Physician Leadership Course while working at St Joseph’s Hospitals.

His commitment to duty has always been an important part of his life. He served for over 15 years in the US Army Reserve, both enlisted and as a medical officer, having served two tours of duty in Iraq.

After practicing anesthesia for over 10 years, Dr. Warren completed an ACGME-accredited fellowship in Interventional Pain Medicine at the University of South Florida. He is now board-certified in both pain medicine and anesthesiology by the American Board of Anesthesiologists. In 2024, he joined the faculty of USF as an Assistant Professor for the USF Pain Fellowship program. 

Dr. Warren treats a variety of pain conditions including neck and back pain, muscle pain, neuropathic pain, cancer pain, and many other types of pain. He accomplishes this by designing a personalized care plan for each patient that may include management of medications, and advanced minimally-invasive techniques such as nerve and joint injections, epidural steroid injections, ablation procedures, sacroiliac joint fusion, kyphoplasty, and implantable devices like spinal cord and peripheral nerve stimulators.

Dr. Warren remains dedicated to continuously improving the practice of pain medicine. As an Assistant Professor with the ACMGE-accredited USF Pain Fellowship, he helps to train the pain physicians of the future. He actively participates in several physician organizations, including the American Society of Interventional Pain Physicians, the American Society of Anesthesiologists, and the Hillsborough County Medical Association. He continues to attend regional and national pain society conferences, where he both studies and presents research on the latest innovations on Interventional Pain Medicine in order to bring these techniques back to his patients in South Florida.

Apollo Pain Management is headquartered in Sun City Center, Florida conveniently located a half mile from I-75. We are proud to serve all of the surrounding communities to include Apollo Beach, Ruskin, Gibsonton, Wimauma, Brandon, Riverview, Ellenton, Palmetto, Parrish, Bradenton, Lakewood Ranch, and Sarasota to name a few. Today, Dr. Warren lives in Apollo Beach with his wife and two daughters, and their dog, Shadow.

Manuel Colon Mendez, MD, MBA, is a board-certified physician specializing in emergency medicine and providing over four decades of expertise to patients at the Regenerative Sport, Spine and Spa in Orlando, Florida.

Dr. Mendez obtained his medical degree from Benemerita Universidad Autonoma De Puebla Escuela De Medicina in Puebla, Mexico. Dr. Mendez’s time in a foreign country helped him experience various healthcare systems while developing a better understanding of how geography changes the accessibility and diagnosis landscapes.

After completing his medical degree, Dr. Mendez attended a residency program at the Puerto Rico Medical Center in Puerto Rico, an affiliate of the University of Puerto Rico. He recognized a passion for emergency medicine during his enrollment and completed his residency, focusing on spine and joint injections.

Dr. Mendez continued on the path of emergency medicine, obtaining over four decades of experience with a personal interest in regenerative medicine and hormone replacement therapy. He received additional training and education in stem cell therapy, advanced cosmetics, and age management medicine to be more well-rounded in these domains.

Dr. Mendez believes that a positive outlook, paired with a healthy diet and lifestyle, helps prevent unwanted illness, and regenerative medicine further aids a healing body. 

When not spending time with patients, Dr. Mendez’s biggest priority is his family. He also enjoys playing the guitar, cooking, and traveling. His biggest motto in life is “never stop learning,” and he encourages his patients to do the same.

Certified by the American Board of Addiction Medicine and the American Board of Emergency Medicine, Daniel Smeester MD is a drug and alcohol addiction treatment specialist in California’s San Francisco East Bay. His state of the art Outpatient Medical Detox program allows people to safely stop their use of alcohol and other substances, even fentanyl, in the comfort of their own home, with in-person office visits or with telehealth, or both. Treatment is Confidential, Comfortable and Successful- with an MD, always!                                              This, combined with intensive counseling (IOP and PHP), leads to significant success in the treatment of addiction.

He also runs a practice specializing in Addiction-free Pain Management with interventional pain management services in the same office. Offered are much safer and more effective medication management options for chronic pain than the typical precribed opiates. With more than 20 years of experience, Dr. Smeester is the Clinical and Medical Director of Diablo Valley Drug and Alcohol Services in San Ramon, aka Diablo Valley Treatment Center, and Center for Pain and Rehabilitation (CPR).

Dr. Smeester graduated from Ponce School of Medicine, a U.S. medical school in beautiful Puerto Rico. He then completed an emergency medicine internship and residency at New York Medical College in New York City. Not only was Dr. Smeester Chief Resident during his final resident year, but he also earned an “Excellence in Emergency Medicine” award and plaque from Academic Emergency Medicine and the “Best Intern” award from New York Medical College.

Passionate about addiction treatment, Dr. Smeester was board certified as an addiction medicine physician in 2014. He has since dedicated his life to fighting drug and alcohol dependence and addiction, at Diablo Valley Drug and Alcohol Services, which earned its Commission on Accreditation of Rehabilitation Facilities (CARF) in 2016.

As a compassionate addiction specialist, Dr. Smeester understands that those struggling with addiction and substance abuse aren’t always treated with the dignity they deserve. That’s why he’s carefully built an environment where his patients can feel comfortable, respected, and valued.

Diablo Valley Drug and Alcohol Services is an outpatient facility, meaning patients can continue working, going to school, and participating in their day-to-day routine while receiving treatment. As a longtime physician, Dr. Smeester has seen how inpatient treatment may be unobtainable due to the disruption in patients’ lives and/or finances and are thus unable to be treated. 

To avoid these disruptions and promote a healthy recovery, he and his team offer a number of helpful outpatient services and evidence-based treatments, including medication-assisted treatment (MAT), group therapy (IOP and PHP), family counseling, individual counseling, detox services ( the only certified and accredited outpatient detox center in or near the San Francisco Bay areas) and more. If hospitalized treatment is necessary or desired, Dr. Smeester’s referral can help to prioritize your admission. If hospital care is needed, he can see you in consultation at Stanford ValleyCare Hospital in Pleasanton, near the San Ramon offices.

Dana Kleinman, DO, is an experienced doctor of osteopathic medicine at the Regenerative Sport, Spine and Spa in Orlando, Florida. Originally hailing from Israel, Dr. Kleinman enjoys helping patients with any concern, no matter how challenging.

Dr. Kleinman obtained a bachelor’s degree in microbiology from Florida Atlantic University in Boca Raton, Florida. Here, she obtained essential knowledge that set the foundation for her continuing education. 

Afterward, she attended Nova Southeastern University in Ft. Lauderdale, Florida, where she obtained a master’s degree in biomedical science. Dr. Kleinman continued to pursue higher education and obtained her medical degree also from Nova Southeastern University.

After completing her residency at Palmetto General Hospital in Hialeah, Florida, Dr. Kleinman worked for several hospital systems as an attending physician in emergency medicine, providing excellent care to her patients. Some of these hospitals include the HCA Florida Oak Hill Hospital in Brooksville, Florida, and the Baycare Winter Haven Hospital in Winter Haven, Florida.

Dr. Kleinman takes a particular interest in hormone replacement therapy and educating patients on the benefits of hormonal balances. She has goals to grow the Regenerative Sport, Spine and Spa by encompassing more community and emphasizing the importance of regenerative medicine, hormones, and aesthetics.

Outside the clinic, Dr. Kleinman enjoys biking, hiking, and traveling, where she and Dr. Santiago often go together. She also likes fitness and particularly enjoys obstacle course runs like mud runs and spartans.

Clifford Baker, MD, is an ACGME board-certified interventional spine and pain management specialist at NovaSpine Pain Institute in Sun City West, Arizona. While skilled in all aspects of pain management, Dr. Baker has a passion for the latest advances in interventional spine treatments, including radiofrequency ablation, kyphoplasty, and spinal cord stimulators. 

In addition to his work at NovaSpine Pain Institute, Dr. Baker continues to provide health services to underserved communities through his work with the Commitment to Underserved People Program (CUP). He also spends his time and uses his expertise in pain management to support those suffering from Alzheimer’s disease through the Alzheimer’s Association of Tucson.

Dr. Baker completed his undergraduate studies in microbiology at the University of Arizona in Tucson and was awarded a NASA space grant to study the effects of microgravity on the immune system. He later earned his medical degree from the University of Arizona and went to Loma Linda University Medical Center in Loma Linda, California, to finish his internship and residency in physical medicine and rehabilitation. While there, Dr. Baker received the Internal Medicine Resident of the Year award for his work ethic and commitment to compassionate care and served as chief resident. He also completed an interventional spine and pain management fellowship and extensively trained in the diagnosis and treatment of spinal disorders and other chronic pain conditions.

Dr. Baker is an active member of the International Spine Intervention Society, the American Academy of Pain Medicine, the American Academy of Physical Medicine and Rehabilitation, and the American Association of Neuromuscular and Electrodiagnostic Medicine.

Using the latest advancements in pain management and interventional spine therapies, Dr. Baker is dedicated to helping NovaSpine Pain Institute patients thrive. He is committed to and enjoys finding solutions to long-term pain through customized treatment plans.

Dr. Baker is currently seeing patients at our Sun City and Sun City West locations.

Clifford Baker, MD, is an ACGME board-certified interventional spine and pain management specialist at NovaSpine Pain Institute in Sun City West, Arizona. While skilled in all aspects of pain management, Dr. Baker has a passion for the latest advances in interventional spine treatments, including radiofrequency ablation, kyphoplasty, and spinal cord stimulators. 

In addition to his work at NovaSpine Pain Institute, Dr. Baker continues to provide health services to underserved communities through his work with the Commitment to Underserved People Program (CUP). He also spends his time and uses his expertise in pain management to support those suffering from Alzheimer’s disease through the Alzheimer’s Association of Tucson.

Dr. Baker completed his undergraduate studies in microbiology at the University of Arizona in Tucson and was awarded a NASA space grant to study the effects of microgravity on the immune system. He later earned his medical degree from the University of Arizona and went to Loma Linda University Medical Center in Loma Linda, California, to finish his internship and residency in physical medicine and rehabilitation. While there, Dr. Baker received the Internal Medicine Resident of the Year award for his work ethic and commitment to compassionate care and served as chief resident. He also completed an interventional spine and pain management fellowship and extensively trained in the diagnosis and treatment of spinal disorders and other chronic pain conditions.

Dr. Baker is an active member of the International Spine Intervention Society, the American Academy of Pain Medicine, the American Academy of Physical Medicine and Rehabilitation, and the American Association of Neuromuscular and Electrodiagnostic Medicine.

Using the latest advancements in pain management and interventional spine therapies, Dr. Baker is dedicated to helping NovaSpine Pain Institute patients thrive. He is committed to and enjoys finding solutions to long-term pain through customized treatment plans.

Dr. Baker is currently seeing patients at our Sun City and Sun City West locations.

Clifford Baker, MD, is an ACGME board-certified interventional spine and pain management specialist at NovaSpine Pain Institute in Sun City West, Arizona. While skilled in all aspects of pain management, Dr. Baker has a passion for the latest advances in interventional spine treatments, including radiofrequency ablation, kyphoplasty, and spinal cord stimulators. 

In addition to his work at NovaSpine Pain Institute, Dr. Baker continues to provide health services to underserved communities through his work with the Commitment to Underserved People Program (CUP). He also spends his time and uses his expertise in pain management to support those suffering from Alzheimer’s disease through the Alzheimer’s Association of Tucson.

Dr. Baker completed his undergraduate studies in microbiology at the University of Arizona in Tucson and was awarded a NASA space grant to study the effects of microgravity on the immune system. He later earned his medical degree from the University of Arizona and went to Loma Linda University Medical Center in Loma Linda, California, to finish his internship and residency in physical medicine and rehabilitation. While there, Dr. Baker received the Internal Medicine Resident of the Year award for his work ethic and commitment to compassionate care and served as chief resident. He also completed an interventional spine and pain management fellowship and extensively trained in the diagnosis and treatment of spinal disorders and other chronic pain conditions.

Dr. Baker is an active member of the International Spine Intervention Society, the American Academy of Pain Medicine, the American Academy of Physical Medicine and Rehabilitation, and the American Association of Neuromuscular and Electrodiagnostic Medicine.

Using the latest advancements in pain management and interventional spine therapies, Dr. Baker is dedicated to helping NovaSpine Pain Institute patients thrive. He is committed to and enjoys finding solutions to long-term pain through customized treatment plans.

Dr. Baker is currently seeing patients at our Sun City and Sun City West locations.

Expert pain management physiatrist Elizabeth Baker, MD, brings considerable experience in the nonsurgical treatment of spinal conditions and musculoskeletal disorders to Spine Center and Orthopedic Rehabilitation of Englewood, PC, serving men, women, and families in and around Englewood, New Jersey. 

Dr. Baker began her professional pursuits at Harvard University in Cambridge, Massachusetts, where she earned her undergraduate degree in biology. She subsequently enrolled at the Columbia University Vagelos College of Physicians & Surgeons in New York City and obtained her Doctor of Medicine. Following graduation, Dr. Baker completed an internship in internal medicine and a residency in physical medicine and rehabilitation, both at Columbia-Presbyterian Medical Center, also in New York City.

Dr. Baker is board-certified in physical medicine and rehabilitation, electrodiagnostic medicine, and pain medicine. She also serves as medical director of rehabilitation medicine at Englewood Hospital in Englewood, New Jersey, and as assistant clinical professor of rehabilitation at Columbia University. 

As a pain management specialist, Dr. Baker loves working with patients to ease discomfort, encourage mobility, and improve quality of life. She’s a former dancer and has a special interest in diagnosing and treating conditions that affect dancers and musicians. Specifically, she has years of experience administering spine, muscle (trigger point and Botox®), and joint injections. Dr. Baker also offers regenerative medicine using platelet-rich plasma (PRP), a cutting-edge technique used to treat chronic tendinitis.

In her spare time you can find her biking, running, skiing, cooking, traveling and spending time with her family. She has also served global communities with international medical missions, most recently in Peru.

Dr. Baker is consistently recognized as one of New Jersey's Best Doctors and recently named by her peers in Bergen Magazine Best Doctors 2021. 

Dr. Baker speaks English and Spanish fluently and welcomes any man, woman, or family seeking relief from acute or chronic pain to Spine Center and Orthopedic Rehabilitation of Englewood, PC, today.

Haresh Sampathkumar, MD, is the Medical Director at Delaware NeuroRehab in Dover, Wilmington and Newark, Delaware. With subspecialty training in Brain Injury Medicine, Dr. Sampathkumar treats the entire spectrum of severity of brain injuries from concussions to coma (AKA Disorders of Consciousness). Due to the complex physical, cognitive, social, and behavioral issues resulting from brain injuries, he uses a coordinated interdisciplinary team approach by collaborating with a group of therapy professionals such as Physical Therapists, Occupational Therapists, Speech-Language Pathologists, Neuropsychologists, prescribing medications, and performing injections for pain and spasticity relief. Some of the injections include but are not limited to botox, phenol nerve blocks, and baclofen pump management.

Dr. Haresh Sampathkumar completed his medical training at Sri Ramachandra Medical College and Research Institute, Chennai, in 2011. He completed an internal medicine internship in 2014 at Unity Health System in Rochester, New York, followed by Residency training in Physical Medicine and Rehabilitation in 2017 at New York Medical College/Metropolitan Hospital Center, New York. He then completed his fellowship training in Brain Injury Medicine in 2018 at the University of Texas Health Science Center at Houston/TIRR Memorial Hermann, Houston, Texas.

Dr. Sampathkumar is also the co-founder of JH Rehabilitation, a comprehensive rehabilitation center in Chennai, India, which offers services for individuals with brain injuries and other neurological conditions. He is a Board member at the Brain Injury Associate of Delaware (BIADE). Aside from raising awareness about Brain Injuries in the community, he is interested in improving the standard of care for patients with Acquired Brain Injuries by collaborating with private, government organizations and colleagues in healthcare. He is particularly interested in empowering individuals with Acquired Brain Injuries to control and direct their own life by independently participating in activities including education and meaningful employment.

Van Malia, DO, is one of the gifted and compassionate pain management and rehabilitation specialists practicing at Advanced Pain Management in Evans, Georgia. He treats all patients with dignity and respect and offers personalized treatments to reduce their pain.

Dr. Malia earned his Doctor of Osteopathy degree at the Des Moines University College of Osteopathic Medicine and Surgery in Iowa. Moving to Columbus, Ohio, during his clinical years in medical school, he rotated through the Ohio State University Medical Center and Ohio University and OhioHealth hospitals. 

Dr. Malia continued his studies by specializing in neurology and anesthesiology before settling on physical medicine and rehabilitation. During his physical medicine and rehabilitation residency at the University of Minnesota in Minneapolis, he was able to combine his passions for osteopathic medicine, neurology, and interventional pain management with physical medicine to help patients restore their mobility and quality of life. 

With the goal of enhancing his skills in interventional pain management and the imaging and diagnosis of spinal and orthopedic issues, Dr. Malia also completed a prestigious spine and pain fellowship at the Cleveland Clinic

As the son of a Vietnam War veteran and the grandson of a World War II veteran, Dr. Malia has a particular passion for helping veterans recover from injuries and manage pain. He has worked with many Iraq and Afghanistan veterans.

Dr. Malia understands the combination of pain, post-traumatic stress disorder (PTSD), traumatic brain injuries, and nerve injuries with which many war veterans live. He aims to serve the men and women who serve the United States with expert care to help lead pain-free fulfilling lives.

Joyce Kim, MD, is an experienced, board-certified anesthesiologist at The Woodlands Sports Medicine Centre in The Woodlands, Texas. She is dual board-certified in pain management and anesthesiology. Dr. Kim specializes in relieving back pain, neck pain, joint pain, headaches, abdominal and pelvic pain, and cancer-related pain.

Using a holistic approach, she emphasizes functionality and quality of life for patients suffering from chronic pain. Dr. Kim focuses on physical therapy, lifestyle modification, medication, and noninvasive or minimally invasive procedures. 

Dr. Kim was born in Madison, Wisconsin. She received her bachelor’s degree with honors from the University of Southern California (USC), where she was named renaissance scholar for achievement in separate fields of study. She attended medical school at the University of Michigan in Ann Arbor, where she also completed residency training in anesthesiology.

Dr. Kim continued training in interventional pain management at the University of Texas MD Anderson fellowship program in Houston, Texas. She maintains her advanced credentials with continuing education. Dr. Kim is a member of the American Society of Anesthesiologists and a diplomate of the American Board of Anesthesiology.

She warmly welcomes patients to The Woodlands Sports Medicine Centre and looks forward to offering them pain relief.

Joyce Kim, MD, is an experienced, board-certified anesthesiologist at The Woodlands Sports Medicine Centre in The Woodlands, Texas. She is dual board-certified in pain management and anesthesiology. Dr. Kim specializes in relieving back pain, neck pain, joint pain, headaches, abdominal and pelvic pain, and cancer-related pain.

Using a holistic approach, she emphasizes functionality and quality of life for patients suffering from chronic pain. Dr. Kim focuses on physical therapy, lifestyle modification, medication, and noninvasive or minimally invasive procedures. 

Dr. Kim was born in Madison, Wisconsin. She received her bachelor’s degree with honors from the University of Southern California (USC), where she was named renaissance scholar for achievement in separate fields of study. She attended medical school at the University of Michigan in Ann Arbor, where she also completed residency training in anesthesiology.

Dr. Kim continued training in interventional pain management at the University of Texas MD Anderson fellowship program in Houston, Texas. She maintains her advanced credentials with continuing education. Dr. Kim is a member of the American Society of Anesthesiologists and a diplomate of the American Board of Anesthesiology.

She warmly welcomes patients to The Woodlands Sports Medicine Centre and looks forward to offering them pain relief.