IPM - Brentwood

4530 Balfour Road Ste E, Brentwood, CA 94513

Fax: (925) 691-9807

Clinic Hours:

Mon – Fri: 8am – 5pm

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Current Patients:
Call to schedule: (925) 691-9806
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Contact Our IPM - Brentwood

IPM - Brentwood - Providers


Carl Fieser, MD

Dr. Carl Fieser is a specialist in Interventional Pain and Physical Medicine and Rehabilitation with IPM Medical Group. Dr. Fieser holds board certification by the American Board of Physical Medicine and Rehabilitation as well as the American Board of Pain Medicine. Dr. Fieser received his medical education at the University of Kansas School of Medicine, where he also completed his internship and residency in Physical Medicine and Rehabilitation. He then completed a one year fellowship in Musculoskeletal Medicine and Interventional and Chronic Pain Management. As a Physical Medicine and Rehabilitation specialist, he focuses on using the latest non-surgical interventional techniques as part of a multidisciplinary approach to pain management. He strives to provide high quality compassionate patient care with an emphasis on improving function and quality of life. Dr Fieser has a special interest in Sports Medicine and is preparing for a board certification in that field. He is able to perform Electrodiagnostic Studies and is a Qualified Medical Evaluator (QME) for the California Workers’ Compensation System. He is also a healthcare entrepreneur with an interest in health related tech start-ups. Dr. Fieser was raised in Kansas and is an obsessive Kansas Jayhawk Basketball fan, as well as an Oakland A's fan. He also enjoys traveling and shooting medium format photography. Dr. Fieser is available to see patients in our Walnut Creek, Brentwood, and Oakland offices and is fluent in Spanish.


Douglas Grant, MD

Dr. Douglas Grant is a specialist in Physical Medicine and Rehabilitation with IPM Medical Group, Inc., a multi-specialty medical group. IPM Medical Group, Inc. is dedicated to helping injured workers and individuals suffering from chronic pain attain the highest level of functioning possible through an integrated medical, vocational and behavioral management approach. Dr. Grant is a 1998 graduate of University of Texas – Southwestern Medical School and completed residency 2002 at the University of Washington in the Department of Rehabilitation. He is Board Certified in Physical Medicine and Rehabilitation with sub-specialty Board Certification in Pain Management. He has specialized in Physiatry and Pain Medicine. Dr. Grant completed a fellowship in Musculoskeletal Medicine and Pain Management with Integrated Physical Medicine. His greatest interest lies in musculoskeletal and pain issues, as he is most concerned with regaining function and reducing pain. Dr Grant has devoted over 10 years to developing expertise in Physiatry and Pain Management. He has thorough training in spine and peripheral joint musculoskeletal medicine, electrodiagnostic studies, and spinal and peripheral joint injection procedures. He is highly skilled at a variety of advanced non-surgical procedures. He has a unique practice style, blending his high-tech expertise in sports, spine, occupational & pain medicine with a special compassion for the human condition. His father was in the US military, and, together, lived at many military bases around the world. He migrated from his adopted home state of Texas to Washington for residency training at the University of Washington, and eventually migrated to northern California. He loves living here with his wife and two children. Dr. Grant feels privileged for the opportunity to participate in the health care of the East Bay community.


Jeff Chen, MD

Dr. Jeff Chen is a specialist in interventional pain medicine and physical medicine and rehabilitation.  He is double boarded with certification from the American Board of Pain Medicine as well as the American Board of Physical Medicine and Rehabilitation.  Dr. Chen graduated from the University of Texas in Austin in 1999 and went on to complete medical school training at UTMB in Galveston, Texas in 2003.  He completed residency in physical medicine and rehabilitation with Southwestern University in Dallas, Texas in 2007.  He then relocated to California to complete his fellowship in interventional pain management with IPM Medical Group. Dr. Chen has an interest in interventional spine care and performs spinal interventional procedures such as interlaminar epidural injections, transforaminal epidural injections, medial branch blocks, and radiofrequency ablation.  Dr. Chen also performs electrodiagnostic studies to evaluate and diagnose nerve injuries.  He is available to see patients in our Walnut Creek and Antioch offices. Dr. Chen now lives in the East Bay area with his wife.  He is fluent in Mandarin Chinese.


Kenneth Kim, MD

Dr. Kenneth Kim completed his undergraduate education at the Johns Hopkins University in Baltimore, MD. He completed his medical school training at Medical College of Pennsylvania/Hahnemann University School of Medicine in Philadelphia, PA. Dr. Kim later completed a residency training program in Physical Medicine and Rehabilitation at Temple University Hospital in Philadelphia, PA. Fellowship training in Pain Management then followed at Integrated Pain Management in Concord, CA. Dr. Kim is double board certified in Physical Medicine and Rehabilitation and Pain Management. Dr. Kenneth Kim, was raised in southern California and now lives in the East Bay area with his wife and two young children.


Matthew Johnson, DO

Dr. Matthew Johnson is a ABPMR Board Certified Physiatrist and Interventional Pain Management Specialist. He is originally from Missouri and graduated from the University of Missouri- Columbia with honors in Biology. Dr. Johnson completed his medical training at Western University in Southern California followed by a one year internship at Pacific Hospital of Long Beach. He completed a residency in Physical Medicine and Rehabilitation at the University of California-Irvine where he served as the Chief Resident during his final year. Following residency he completed a one year fellowship in interventional pain management. Dr. Johnson’s interests include neuropathic pain, back and neck pain, joint pain, headaches, fibromyalgia pain, abdominal pain, non-surgical management and rehabilitation of orthopedic issues and industrial injuries, and general debility. He also performs Electrodiagnostic Studies (nerve conduction studies and electromyography) to diagnose nerve problems. He is an expert in interventional pain techniques such as radiofrequency ablation, epidural steroid injections, selective nerve blocks, Botox administration, neuromodulation, and joint injections. Dr. Johnson is a Qualified Medical Examiner for the State of California Worker's Compensation system and is an expert in matters of disability and function. Dr. Johnson is available to see new patients immediately.


Navjeet Boparai, MD

Dr. Navjeet Boparai is a specialist in Interventional Pain and Physical Medicine and Rehabilitation. Dr. Boparai holds board certification by the American Board of Pain Medicine and the American Board of Physical Medicine and Rehabilitation. Her practice is focused in the area of Pain Medicine. Dr. Boparai specializes in multiple aspects of pain management, including spinal injections, chronic and acute musculoskeletal pain, neuropathic pain, and electro diagnostic studies. Dr. Boparai strives to provide comprehensive medical treatment enabling her patients to lead a more functional and fulfilling life. Dr. Boparai graduated from the University of California, Los Angeles in 2000. She obtained her undergraduate degree in Neuroscience. She then completed a post-graduate program at Rosalind Franklin University of Health Sciences in North Chicago, Illinois, where she obtained a Master of Science in Applied Physiology. She went on to receive her medical degree in 2005 from Chicago Medical School. She then completed a one year transitional internship at Alameda County Medical Center in Oakland, California. She completed her residency in Physical Medicine and Rehabilitation at Stanford University Hospital and Clinics. Dr. Boparai completed a one year fellowship in Interventional and Chronic Pain Management with IPM Medical Group, Inc. Dr. Boparai was born and raised in California and currently lives in the East Bay with her husband and three children. She is available to see patients in our Walnut Creek and Brentwood offices. She is fluent in Spanish, Hindi, and Punjabi.


Courtney Perry

Courtney Perry is an East Coast native and grew up in the beautiful state of Massachusetts. In 2011, she relocated to Portland, Oregon where she attended Portland State University for her undergraduate degree. During this time, she spent much time volunteering in various health care settings, locally and abroad, solidifying her decision to pursue a career in the medical field. She later attended Bay Path University and graduated with a Master of Science in Physician Assistant Studies. While attending Bay Path, she had the opportunity to travel to Ghana and gain additional perspectives from medical providers in rural communities. Courtney’s goal is to deliver compassionate care tailored to each individual patient and help those who suffer from chronic pain. She is excited to be a part of IMP and proud to work with such a fantastic team of practitioners. Courtney resides in the East Bay with her husband and continues to travel as often as possible.


Evan Quadjovie, NP

Evan Quadjovie is originally from West Africa. He is fluent in French and five African languages. He graduated with a Bachelor of Science in Computer Science from the University of Maryland and worked as a software engineer for six years before embarking on his healthcare career. Evan earned a Bachelor of Science in Nursing and a Master of Science in Nursing (Summa Cum Laude) from Samuel Merritt University (SMU) and is on track to complete his Doctorate in Nursing Practice in Fall 2020 at SMU. Most of his nursing experience has been in the critical care setting. Evan also works at John Muir Medical Center in Walnut Creek as a registered nurse in the post-anesthesia care unit. He has extensive experience in post-surgical pain management. Evan is an avid Golden State Warrior’s basketball fan. He is married and lives in Concord with his wife, their three children and two dogs.


Hannah Manago, NP

Hannah graduated from University of Nevada, Las Vegas with her Bachelor of Science in Nursing in 2014. She worked as an acute RN for 3.5 years in the post-surgical orthopedic and vascular unit. During those years she developed an interest and passion for pain management and orthopedic injury treatments. After completing her Master of Science in Nursing degree from University of Southern California in 2019 she became nationally certified by the American Academy of Nurse Practitioners. During her first year as Nurse Practitioner she worked in a sports medicine clinic and learned about various feet and ankle injuries and treatments. She believes in an individual and holistic approach to help and treat each patient. In her free time, Hannah likes to go to the gym with her fiancé, travel, and spend time with her family and her dog, Tally.


Sang Yoon, L.Ac

Sang Won Yoon has been a Diplomat of Oriental Medicine since 2004 (NCCAOM) and California licensed acupuncturist since 2005. He graduated with a Master in Traditional Chinese Medicine from the Academy of Chinese Culture and Health Science in Oakland, CA. After passing his California board exam, he went to Shanghai, China for a post-graduate internship at Shu Guang TCM Hospital. Afterward, he went to Kyung Hee University Hospital, in Seoul, South Korea, where studied in the Oriental medicine wing of the hospital at the internal medicine, neuropsychiatry, rehabilitation medicine, and gynecology departments. Sang Won has traveled all around the world treating and educating people about acupuncture. I have a passion for Chinese Medicine and trying to help improve the lives of my patients.


Shirley Carrillo, NP

 Shirley Carrillo is a Nurse Practitioner at both the Brentwood and Walnut Creek IPM locations.  Shirley Graduated as a Family Nurse Practitioner from UOP with a Post Masters’ Degree with Honors and is still a current member of Sigma theta Tau.  

Her extensive experience as a Nurse and a Nurse Practitioner has led her on a pathway to med surgery, OBGYN and Peds, Cardiology with Telemetry, Chemotherapy Nurse, Post Anesthesia Recovery room, Emergency room Nurse, Case Management, Allergy Nurse, CPR/ACLS instructor, Telephone Advice nurse and Pain Management Specialist. Outside of Work Shirley Walks her dog Zorro daily, she exercises and participates in fitness events.