Louis Bojrab, MD, FIPP

Board Certifications:

  • Diplomate of the American Board of Anesthesiology 

  • Diplomate American Board of Interventional Pain Physicians 

  • Diplomate of Fellowship of Interventional Pain Practice (FIPP)

  • Subspecialty Certification in Pain Management by the ABA


Medical Staff Appointments

  • Forest Health Medical Center - Ypsilanti, MI

  • St. Joseph Mercy Hospital - Ann Arbor, MI

  • ProMedica Bixby Medical Center - Adrian, MI

  • St. Joseph Mercy Hospital Saline - Saline, MI

  • Chelsea Community Hospital - Chelsea, MI


Dr. Louis Bojrab has been a practicing pain specialist since 2000, when he completed his fellowship at Lake Forest University. In private practice his focus has been on careful evaluation and diagnosis of each patient, employing a multidisciplinary approach to solving painful conditions. He has a special interest in new technology including kyphoplasty, vertebroplasty, endoscopic discectomy of the lumbar and cervical spine, Spinal Cord Stimulation, Discography, and cancer pain pumps. Staying at the cutting edge allows his patients to get new technology far before it is obtainable to the entire country.


Dr. Bojrab was the first pain specialist in Michigan to perform a percutaneous discectomy in the lumbar spine, and has hosted the first course in Michigan for Percutaneous Discectomy of the cervical spine. He now is an expert in Endoscopic Spine Surgery to offer the minimally invasive surgery advantage for his patients. There are a variety of endoscopic surgeries he performs such as Endoscopic Discectomy, Endoscopic laminotomy, Endoscopic Foramenotomy, and Endoscopic Rhizotomy (Radiofrequency). 

He was also the first pain specialist in Michigan to perform Endoscopic LASER discectomy of the spine.

Dr. Bojrab is the Principle Investigator for multiple Spinal Stimulator research studies. He sits on the Boston Scientific Advisory Board. Dr. Bojrab has also held the office for Pain Chairman for the Michigan Society of Anesthesiologists. He is the past Vice President of the Michigan Chapter of the American Society of Interventional Pain Physicians. He is a national instructor for the ASIPP to teach spine procedures to other pain physicians around the USA. He has been an instructor for St. Jude Medical to teach advanced Spinal Cord Stimulation to other physicians nationally. He is the principal investigator (PI) for Boston Scientific's RELIEF study to research outcomes of Spinal Cord Stimulation.


Of all his awards, research, and professor titles, what he really enjoys is making relationships with his patients. Therefore, he understands his patients' issues and can get the best possible outcome for each person.


Board Certifications

  • Diplomate of the American Board of Anesthesiology (ABA)

  • Subspecialty Certification in Pain Management


  • 1988 - 1991 Anesthesiology Residency at the University of Michigan - Ann Arbor, MI

  • 1987 - 1988 Internship at William Beaumont Hospital - Royal Oak, MI

  • 1982 - 1987 Medical Degree (M.D. and Masters in Public Health (M.P.H.) from the University of Michigan - Ann Arbor, MI

Dr. John Chatas was born and raised in Ann Arbor, MI. He earned a Master's Degree from the University of Michigan School of Public Health and a Medical Degree from the University of Michigan Medical School in 1987. He completed his residency in Anesthesiology at the University of Michigan and became a Board Certified Anesthesiologist in 1991.

Dr. Chatas has been a member of the Saint Joseph Mercy Hospital (SJMH) medical staff in Ann Arbor as an Interventional Pain Specialist since 1991. Dr. Chatas has hospital privileges at ProMedica (Bixby Hospital), Providence Hospital in Novi, and the SJMH partner hospitals in Saline, Chelsea, and Howell. Dr. Chatas is a founding partner of Michigan Pain Specialists. In 2003, Michigan Pain Specialists became the first office based pain management practice offering state-of-the-art treatment in Ann Arbor, MI. Michigan Pain Specialists has grown, and physicians have been added to cover our locations in Ypsilanti and Adrian.

Dr. Chatas has a Subspecialty Certification in Pain Medicine through the American Board of Anesthesiologists. In 2007, Dr. Chatas achieved the highest certification possible in his field by becoming a Fellow of the World Institute of Pain. He is also Board Certified by the American Board of Interventional Pain Physicians. He also serves as the president of the Michigan Chapter of this society. In 2009, Dr. Chatas was recognized by his peers as one of the Southeast Michigan's "Top Doctors" in his specialty of Pain Medicine.

Dr. Chatas specializes in the diagnosis and treatment of painful conditions related to the spine. He also specializes in other painful disorders including CRPS or RSD, headaches, muscle pain, joint pain, pain from rheumatologic diseases, and cancer related pain.

Dr. Chatas has expertise in using, and teaching, advanced interventional pain treatments including:

  • Percutaneous Vertebroplasty (cementing of fractured back bones)

  • Spinal Cord Stimulation for back, leg, neck, or arm pain (Michigan Pain Specialists is a nationally recognized physician training center with St. Jude Medical formerly known as ANS)

  • Management of Medtronic Intrathecal (spinal) pumps

  • Minimally invasive disc surgery for the neck, chest, and lower back

  • Radiofrequency Lesioning (nerve cauterization treatments) of spinal nerves for the treatment of arthritic conditions of the head, neck, and back

  • Epidural steroid injections, joint injections, and nerve blocks

Apart from medicine, Dr. Chatas enjoys both playing ice-hockey and assisting with coaching his son's hockey team. He is also an avid fly-fisherman and downhill skier.


Board Certifications

  • Diplomate of the American Board of Anesthesiology (ABA)

  • Subspecialty Certification in Pain Management by the ABA

  • Diplomate of the American Board of Pain Medicine


  • 1995 - 2002 Medical Director - Michigan Pain Institute

  • 1990 - 1993 Residency at University of Iowa Medical Center in Anesthesiology

  • 1989 - 1990 Internship at Blodgett Memorial Medical Center - Grand Rapids, MI

  • 1985 - 1989 University of Michigan Medical School

  • 1981 - 1985 B.S. Chemistry - University of Michigan

Medical Staff Appointments

  • St. Joseph Mercy Hospital - Ann Arbor, MI

  • St. Joseph Mercy Hospital Saline - Saline, MI

  • Chelsea Community Hospital - Chelsea, MI

  • St. Joseph Mercy Hospital Livingston - Howell, MI

  • Woodlands Medical Center - Brighton, MI


Dr. Edward Washabaugh was born in Bay City, Michigan and he is a graduate of the University of Michigan School of Medicine and the College of Literature, Science and Arts. His residency in anesthesiology was at the University of Iowa. He is a Fellow of Interventional Pain Practice. Dr. Washabaugh has 25 years’ experience in interventional pain management with special clinical and research interests in spinal cord stimulation, intrathecal pain pumps and minimally invasive spinal surgery. He is a founding member of Michigan Pain Specialists. In addition to his medical practice, he is on the executive board of the Michigan Society of Interventional Pain Physicians and Washtenaw County Medical Society.


Dr. Washabaugh is board certified in pain management by the American Board of Pain Medicine and has added qualifications in pain management by the American Board of Anesthesiology. He is re-certified by the American Board of Anesthesiology. He is a member of the American Medical Association and the Michigan State Medical Society. Dr. Washabaugh resides in Ann Arbor, MI with his wife and has three children and one grandchild.

Joan Westbrook PA-c

Physician Assistant Studies, Wayne State University inaugural class 1998
Master's of Education in Exercise Science 1988 Wayne State University
BS in Dietetics 1984 Michigan State University

Michigan Association of Physician Assistants
American Association of Physician Assistants
Preceptor to PA students, WSU, U of D Mercy, CMU

Joan has been a PA for 20 years, starting with Family Practice and Sports
Medicine. She was also a renal dietitian before embracing a second career as
a PA. Wellness and exercise has always been important to her and to
encourage with patients. She likes to treat the patient as a whole and work
towards the best quality of life. She considers herself a partner with the
patient to decide the best possible options of care available.
Hobbies include travel, biking, quilting and kayaking

Robert Parks, MS, PA-c

Robert received baccalaureate degree from Madonna University and holds a Master of Science from the University of Detroit Mercy as a physician assistant, where he was elected President of the William Beaumont Society (Class President).

He received honors in general surgery from Yale University, cardiothoracic surgery from University of Michigan, internal medicine from Cook County Hospital and Veteran’s Administration Medical Center, emergency medicine from Detroit Receiving Hospital, Obstetrics and Gynecology from Hutzel Hospital, pediatrics from Henry Ford Hospital, and psychiatry from Brighton Hospital.

Robert has provided ultrasonically and fluoroscopically guided procedures since 2000.  

He is trained as a First Assistant at Surgery in general, orthopedic, cardiothoracic surgery, and as primary operator for device implantation and removal.  He holds a credential as a wound care expert.  

Robert joined the family at Michigan Pain Specialists in 2016, and has since embraced his position on the team, helping people in acute and chronic pain.

Nicole Davison, PA-c
Nicole Davison, PA-C, has been a certified PA since 2012, and has been with Michigan Pain Specialists since September 2014.  She obtained a Bachelor of Arts in Social Work from Michigan State University and a Master of Physician Assistant from Chatham University in Pittsburgh PA.  She uses her combined background in both social work and medicine to help patients find effective and long-lasting solutions for their pain.  She enjoys creating positive and comfortable relationships with each of her patients.  She maintains memberships with Michigan Academy of Physician Assistants and the American Academy of Physician Assistants.  Nicole resides in West Bloomfield, Michigan  and enjoys spending time with her husband and young daughter. 


Sarah Schmitz, PA-C

Sarah Schmitz, PA-C, is a certified physician assistant who has been with Michigan Pain Specialist since June 2017. Prior to becoming a physician assistant, Sarah was an elementary school teacher. She utilizes her education background to educate patient and families about different pain conditions and treatment options. Sarah enjoys running, spinning, weight lifting, reading, and working on remodeling projects around the house. Sarah and her husband, Spencer, reside in Saline, Michigan.


Undergraduate Education

Eastern Michigan University

Graduate Education

University of Toledo


Other Distinctions

Michigan Academy of Physician Assistants

American Academy of Physician Assistants


(866) 835-7246

Ypsilanti Office

Forest Health Medical Center  

135 S Prospect St, Ypsilanti, MI, 48198 

Phone (734)547-4860

Adrian Office

Riverside Professional Building

770 Riverside Ave, Suite 207, Adrian, MI 49221

Phone: (517) 920-4453