an integrated approach to medical care

Finding the cause, not just treating the symptoms.

Dr. Johnson and his staff combine decades of experience in the diagnosis and treatment of chronic health conditions, such as toxic mold exposure, autoimmune issues, gastrointestinal disorders, chemical sensitivity, and severe allergies.

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Through his many years of experience, Dr. Johnson and his staff are uniquely qualified to address particular environmental and chronic health conditions.

Mold Sensitivity & Toxicity
Chronic Fatigue & Autoimmune Conditions
Chronic Gastrointestinal Problems
Toxic Exposure & Chemical Sensitivity
Neurofeedback / Biofeedback
Functional Medicine
Allergy Testing & Treatment
Hyperbaric Oxygen Therapy
Lyme Disease & Epstein-Barr (EBV)
Hormone Replacement & Women’s Health
Musculoskeletal Osteopathic Evaluation & Treatment
Infective Encephalopathy: Toxic, Viral, Bacterial

Alfred R. Johnson, D.O.


Dr. Johnson is a doctor of internal and environmental medicine with 35+ years experience in the areas of chronic illness, toxic exposures, allergy, and the use of hyperbaric oxygen therapy to address a multitude of conditions.

Genevieve Taylor
Hyperbaric Oxygen Patient

Over the summer, a bicycle injury left me with a major muscle contusion. My doctor recommended hyperbaric oxygen therapy as a way to speed the healing process so I could be ready for the volleyball season in the fall. Even after a few treatments I could feel myself healing quickly, and the pain and swelling diminishing. It was so so easy and the feeling of being in the chamber was almost spa-like. Unreal. Great place, totally recommend!

Mike Black
Hyperbaric Oxygen Patient
After a traumatic brain injury in 2011 I was having problems with short term memory issues and after using the Hyperbaric chambers here at The Hyperbaric Centers of Texas we have seen a marked improvement. Thank you Dr. Johnson!

 I can say now after neurofeedback and your counsel, I believe my son is set up for success in life. After being diagnosed as ADHD as a child and on meds, this became a band aid for his true health. He depended heavily on medicine just to feel normal. We soon saw improvement weeks into neurofeedback. My son has learned life habits that will improve his quality of life. He is now medicine free and has no side effects or crashes at the end of the day. For the first time in a long time, I feel I have my son back! On behalf on my entire family, thank you!


I came to your office in tremendous physical and emotional pain, and the care I have received has been thorough, highly effective, and life-changing for me and my family. I have been going to many doctors since I sustained combat injuries, and have had several surgeries. None have been as effective as you and your team’s work. I feel like I am getting my life back again. My mental state is improving and I have been able to get off two of my medications. You have amazing team members that care.

Erik Fishman
Toxic Mold Patient

I came to Dr. Johnson hoping to address a long term mold exposure issue I had been dealing with. He was able to treat me effectively and I no longer have abnormal levels of toxic mold exposure, my symptoms also went away completely. Dr. J has also helped me navigate multiple cases of Covid-19, chronic fatigue, and a bad case of appendicitis. I feel extremely fortunate to have crossed paths with This practice and I recommend it highly. While this office excels in the treatment of patients with difficult/complex cases, they have proven extremely helpful and timely in the treatment of things as small as a flu or a stomachy bug. If you are reading this and you have been dealing with chronic fatigue, mold exposure, lyme disease, or anything that has proven difficult to resolve, I would highly recommend a consultation with Dr. Johnson.

Johnson Medical Associates is a state-of-the-art medical clinic that offers comprehensive medical services to patients in a friendly, professional environment.

We Are Located


Johnson Medical Associates
997 Hampshire Lane
Richardson, TX 75080-8105

Contact Us

+1 (972) 479-0400

+1 (800) 807-7555

+1 (972) 479-9435

our hours

9:00am – 4:30pm


Saturday & Sunday: