Welcome to the Rossignol Medical Center

*** Please note new Florida address ***

About Dr. Dan Rossignol, MD FAAFP

Dr. Dan Rossignol, MD FAAFP is a board certified family physician. He received his Doctorate of Medicine at the Medical College of Virginia and completed his residency in family medicine at the University of Virginia.  Coming from an academic background, Dr. Rossignol searched the medical literature looking for a solution after both of his children were diagnosed with autism.  He has made it his mission to research and publish in autism. Since 2006, he has 55 papers, abstracts, editorials, and book chapters (including those in press) concerning autism and related conditions. 


Dr. Rossignol has a special interest in autism spectrum disorders, PANS/PANDAS, cerebral palsy, and related neurological and developmental disorders as well as medically complex children and adults.  Dr. Rossignol is a Fellow of the American Academy of Family Physicians (FAAFP) and a Fellow of the Medical Academy of Pediatric Special Needs (FMAPS). Dr. Rossignol sees patients in both the Florida and Aliso Viejo offices. 


See Dr. Rossignol's Google Scholar Profile.

About Lanier Rossignol, BSN FNP-C

Lanier Rossignol, BSN FNP-C is a certified family nurse practitioner. She received her graduate training as a Family Nurse Practitioner and her Master’s Degree in Nursing from the University of Virginia. She also has a Bachelor of Arts in Neurobiochemistry and a Bachelor of Science in Nursing from the University of Virginia. After her two sons were diagnosed with autism, she sought information from a number of sources including researchers, specialists, the medical literature, and she attended 6-8 autism medical conferences per year to help find answers for her sons. As biomedically-based treatments helped her sons begin speaking, she became more involved in research in autism. After years of focusing on both her sons and her own medical issues, she has now joined her husband, Dr. Rossignol, and his medical practice as a Nurse Practitioner to help families struggling with the underlying medical issues of autism.  


Lanier has a special interest in autism spectrum disorders, PANS/PANDAS, chronic fatigue, and health and wellness through diet, supplements and exercise. Lanier is seeing patients in our Aliso Viejo office.

About Nicole Rincon, MS PA-C

Nicole Rincon, PA-C is a board certified physician assistant. She majored in biology at UC San Diego (UCSD) and graduated with honors. While attending UCSD, her major areas of focus were microbiology and genetics. Nicole continued her health care education at Western University of Health Sciences where she graduated on the Dean’s List with a Master’s Degree in Physician Assistant Studies in 2007. She is board certified as a Physician Assistant by the National Commission on Certification of Physician Assistants (NCCPA).


Nicole began her career in integrative medicine focusing on nutritional counseling and wellness supplementation. In 2012 Nicole gave birth to triplets. After their second birthday, her children regressed developmentally and her two sons were diagnosed with autism and her daughter with seizures. She then dedicated her studies to the biomedical treatment of autism and seizures. She has attended a number of medical conferences and webinars focusing of pediatric special needs, including the Medical Academy of Pediatric Special Needs (MAPS), where she met Dr. Rossignol. Nicole's medical focus includes natural and medical treatments as well as dietary and healthy lifestyle strategies. Nicole is seeing patients in our Aliso Viejo office.

About Sandi Kreizenbeck, DNP FNP

Sandi Kreizenbeck, DNP, FNP received her Bachelor of Science in Nursing degree from the University of San Francisco, a Master of Science in Nursing and a Family Nurse Practitioner degree from Holy Names University, and a Doctor of Nursing Practice degree and a Psychiatric Nurse Practitioner degree from the University of San Francisco. In addition, she is currently enrolled in the Masters in Public Health program at the University of San Francisco.


About ten years ago, Sandi started working in Dr. Lynne Mielke's autism clinic as a Registered Nurse, at which time she was inspired to become a nurse practitioner. Sandi has worked as a Nurse Practitioner in Dr. Mielke's autism and adult clinics for the past 5 years.


Sandi is a MAPS (Medical Academy of Pediatrics Special Needs) fellow and has been trained extensively by Dr. Mielke since 2007 and by Dr. Rossignol since 2012. She attends multiple medical continuing education conferences every year, including the American Academy of Antiaging Medicine, MAPS, psychiatric and Lyme Disease conferences. 


Sandi brings personal experience and empathy to her interactions with her patients because she has a son with autism and another close family member who is in a managed state of recovery from autism. She has dedicated her life’s work to helping patients of all ages achieve optimal health and wellness. Sandi is seeing patients in the RMC Northern California office.

About Dane Fliedner, MD MPH FAAP

Dane Fliedner, MD MPH FAAP is an Integrative and Functional Medicine Pediatrician. He is Board-Certified and a Fellow of the American Academy of Pediatrics and the American Board of Integrative Holistic Medicine. He is a member of the Institute for Functional Medicine and will be an IFMCP in 2017. He is also finishing up his fellowship with the Medical Academy of Pediatric Special Needs (MAPS) in 2017.


A Southern California native, he earned his Doctorate of Medicine while also earning his Master of Public Health from New York Medical College. He completed his Pediatric Residency Training at University of California, Irvine. He has had a diverse career having worked from Community Clinics in underserved areas in California to working in the emergency room as a faculty member of the Department of Pediatric Emergency Medicine at UT Southwestern Medical School/ Children’s Hospital of Dallas.


His journey into integrative medicine began when his two daughters started to suffer with chronic health conditions that were not getting answers despite seeing multiple specialists. After seeing an integrative medicine specialist and experiencing positive results in his children’s health, he was humbled and began his journey into the world of integrative medicine and health. He began his journey into biomedical autism when he began having more patients consulting with him regarding issues related to autism and has been excited to see many positive results from applying functional and biomedical principles to complex chronic medical conditions.


When he is not seeing patients, he enjoys spending time with his wife and 2 daughters, studying and teaching Indian philosophy and yoga (he also has extensive training in Yoga, Yoga therapy and Kid’s Yoga) and being outside hiking, mountain biking or surfing. Dr. Dane is seeing patients in our Aliso Viejo office.

About Salma Ahsan, DO

Dr. Salma Ahsan, DO, FMAPS is a board certified Internal Medicine physician and a fellow of the Medical Academy of Pediatric Special Needs (MAPS). After her under-graduate education she worked at Johns Hopkins University doing research in Genetics and Molecular Biology. She received her doctorate in Osteopathic Medicine from Philadelphia College of Osteopathic Medicine and completed her residency in Internal Medicine at the University of Medicine and Dentistry of New Jersey School of Osteopathic Medicine. After residency training she specialized in hospital medicine and practiced as a hospitalist physician at the Medical College of Central Georgia in Macon, Georgia and then at St. Mary’s Hospital in Athens, Georgia. She has also served as a community adjunct professor for the Medical College of Georgia at St. Mary’s Hospital.


After her youngest son was diagnosed with Autism and her oldest son with ADHD and dyslexia, she started attending Autism medical conferences and researching the medical literature to find ways to help her children. Her children have been patients of Dr. Rossignol’s for many years and she saw great improvements with biomedical interventions under his care. She has completed the clinician training series through the Autism Research Institute and recently completed the fellowship program from the Medical Academy of Pediatric Special Needs under Dr. Rossignol’s mentorship.


Dr. Ahsan has a special interest in hyperbaric oxygen therapy as she saw great improvements in her son with Autism with HBOT. She has undergone clinician training for hyperbaric oxygen therapy from the International Hyperbaric Association and the Undersea and Hyperbaric Medical Society. Dr. Ahsan is a member of the American College of Osteopathic Internists, the American Osteopathic Association, and the Medical Academy of Pediatric Special Needs.  Dr. Ahsan is seeing patients at our Melbourne, Florida office.

Not just medicine - It's about caring and helping you and your child

Caring for medically complex children and adults is, obviously, complex.  There are no “cookie cutter” templates that can be followed that will work consistently for all individuals.  Each individual possesses a unique medical puzzle.  That is why Dr. Rossignol treats each person individually, providing care with one goal in mind – to unlock this puzzle and allow each individual to thrive.

Identifying the biochemical fingerprint of autism: Implications for testing and treatments

Accumulating evidence has demonstrated that autism is sometimes characterized by complex abnormalities such as oxidative stress, mitochondrial dysfunction, inflammation, certain genetic abnormalities, exposure(s) to environmental toxicants, immunological abnormalities, infections, and in some cases, developmental regression and seizures. These abnormalities may contribute to the symptoms of autism, such as sleep problems, obsessive behavior, speech delay, impaired social interaction, self-stimulatory behavior, hyperactivity, inattention, and abnormal gastrointestinal findings.  Many children with autism have a unique combination of these abnormalities and may possess some or all of these problems simultaneously.  The early identification of these abnormalities may help clinicians and parents choose more effective treatment options.  Dr. Rossignol’s aim is to identify the unique biochemical abnormalities that each individual possesses (e.g., the biochemical fingerprint) and work to create the most effective treatments for these abnormalities using evidence-based medicine principles.  See a list of publications by Dr. Rossignol which discuss many of these abnormalities and potential treatments.


1.  Name and license: Daniel A. Rossignol, Physician
2.  Highest level of academic degree: MD
3.  Board certification: American Board of Family Medicine (ABFM) 


1.  Name and license: Lanier W. Rossignol, Nurse Practitioner

2.  Highest level of academic degree: BSN, FNP-C

3.  Board certification: American Academy of Nurse Practitioners (AANP)  

                                 Certification Program


1.  Name and license: Nicole Rincon, Physician Assistant

2.  Highest level of academic degree: Master's Degree (MS) in Physician

                                 Assistant Studies, PA-C

3.  Board certification: National Commission on Certification of Physician

                                 Assistants (NCCPA)


1.  Name and license: Sandra Kreizenbeck, Nurse Practitioner
2.  Highest level of academic degree: BSN, MSN, FNP, PMHNP
3.  Board certification: Psychiatric Mental Health Nurse Practitioner

                                 (PMHNP), American Nurses Credentials Center


1.  Name and license: Dane Fliedner, Physician

2.  Highest level of academic degree: Master's of Public Health (MPH), MD

3.  Board certification: American Board of Pediatrics


1.  Name and license: Salma Ahsan, Physician
2.  Highest level of academic degree: DO
3.  Board certification: American Osteopathic Board of Internal Medicine

Follow Dr. Rossignol on twitter: @danrossignol