About Montgomery Medical Clinic
OUR MISSION
A Legacy of Compassionate Care
By choosing one of our physicians as your primary care provider, you'll benefit from:
- Personalized attention and continuity of care
- Advanced treatments using the latest medical technology
- Expert dermatology care for all your skin health needs
- A lasting relationship with trusted healthcare professionals
- Convenient access to a full range of medical services
Meet Our Expert Providers
Dr. Efi Kessous
MD, MPH
Dr. Efi Kessous is a board-certified primary care physician who practices at our urgent care center and serves as a trusted primary doctor at Montgomery Medical Clinic. As a primary care provider, he is also an Assistant Professor and faculty member at The George Washington University School of Medicine & Health Sciences.
As a primary care physician at our urgent center, his clinical interests include procedural family medicine, injury management, women’s health, and occupational medicine. Dr. Kessous is committed to providing comprehensive urgent care and primary care services for individuals and families as their dedicated primary doctor.
He is a member of the American Academy of Family Physicians and serves as a designated FAA aviation medical examiner, bringing a diverse skill set to patient care.
Dr. Bertha Velandia
MD
Dr. Bertha Velandia is an experienced primary care provider and primary doctor who received her medical degree from the Universidad Nacional in Bogota, Colombia in 1983. As a primary care physician, she completed her residency in family medicine at the UAB Huntsville Medical Campus in 2009.
During her distinguished career, Dr. Velandia has received an outstanding award in Obstetrics and Gynecology. She has also dedicated time serving in rural communities and published research on scurvy in developed countries.
As a dedicated primary care physician at our urgent care center, Dr. Velandia brings warmth and experience as a primary doctor, making urgent care and primary care services accessible and compassionate for families in Gaithersburg.
Dr. Eran Kessous
MD, CAQSM
Dr. Eran Kessous is board certified in both family and sports medicine. He completed his sports medicine training at Harvard Medical School’s Children’s Hospital in Boston. Dr. Kessous received his medical degree from St. George’s University in 1999, completed a surgical internship at Mount Sinai School of Medicine in New York, and after three years as a general and orthopedic surgery resident at Tel Aviv Medical Center, returned to Boston to complete a family medicine residency at Boston University Medical Center. He was an official team physician for the Major League Soccer Team DC United and is currently the medical consultant for the Kirov Academy of Ballet. He is also a clinical assistant professor at Georgetown University School of Medicine.
Dr. Jonathan Lawless
DO, CAQSM
Dr. Lawless is board-certified in family medicine and sports medicine. He completed his sports medicine training and family medicine training at Northwell Plainview Hospital in Plainview, NY. Dr. Lawless graduated from medical school at Lake Erie College of Osteopathic Medicine in 2012 and completed a traditional rotating internship at UPMC Mercy Hospital in Pittsburgh, PA. He was appointed a teaching associate in family medicine at Hofstra Northwell School of Medicine. His experience includes team physician for LIU Post University and medical coverage for marathons and triathlons. His skills include musculoskeletal care, diagnostic musculoskeletal ultrasound, ultrasound-guided injections, and osteopathic manipulative treatment.
Dr. Sara Brooks
MD, Board Certified Dermatologist
Dr. Sara Brooks is a Board Certified Dermatologist and Maryland native from St. Mary’s County. She attended the Honors college at University of Maryland, College Park, obtaining both a Bachelor’s in Cell Biology and a Master’s in Management and Organization. She went to medical school at Drexel University in Philadelphia, where she was inducted into AOA, the prestigious medical honor society. She completed a medical internship at Thomas Jefferson University and her residency in Internal Medicine and Dermatology at Georgetown University and Washington Hospital Center, where she served as Chief Resident of Dermatology. She also completed a Melanoma Fellowship at the Washington Cancer Institute. She is a Fellow of the American Academy of Dermatology.
Dr. Marsha D. Mitchum
MD, MPH, Board Certified Dermatologist
Dr. Marsha Mitchum is a board-certified dermatologist with extensive experience in medical and oncologic dermatology. Before entering medicine, she served in the United States Air Force as a KC-135 pilot and instructor, completing assignments across Europe and the Pacific. She later transitioned to medicine, serving as a Flight Surgeon and Dermatologist at several major military medical centers. Dr. Mitchum completed her Dermatology Residency with the National Capital Consortium and a Fellowship in Cutaneous Oncology at the Dana-Farber Cancer Institute and Brigham and Women’s Hospital, Harvard University. She also worked as a Medical Officer in the Division of Oncology at the U.S. Food and Drug Administration, where she contributed to national cancer drug evaluation and clinical research oversight. Her clinical interests include general medical dermatology, skin cancer diagnosis and treatment, and complex skin disorders. At Montgomery Medical Clinic Dermatology, Dr. Mitchum is dedicated to providing evidence-based, compassionate care—combining her background in medicine, oncology, and aviation to deliver precise, patient-centered treatment.
Dr. Heon Y Jang
PT, DPT
Dr. Heon Y Jang, PT, DPT is a graduate of Medical College of Virginia Campus, Virginia Commonwealth University. Prior to attending Doctor of Physical Therapy program, he attended South Western University in the Philippines and Won kang Health science college in Korea. He served in the Korean Air Force as a medic contributing to the Air Force Military health and readiness and was discharged honorably after 30 months of service. He has had over two decades of clinical experience as a Physical Therapy Practitioner focusing on orthopedic conditions and sports injuries. His academic and clinical training includes spinal manipulation through studies at Wonkang Health Science, and Functional Dry Needling through advanced training at Kinetacore Institute for Pain Management and sports Injuries. His approach is unique in that he tries to focus on the origin of the clinical symptoms even for extremity overuse syndromes and acute injuries. This comes from his own treatment for the injuries he sustained while practicing Martial arts and practicing manual therapy for diverse spinal patients. He has practiced Martial arts in Taekwondo, Kickboxing, kendo, boxing and has seen various martial arts associated injuries. He also has worked on diverse scoliosis patients helping them relieve pain and lead their lives at their full strength.
Hodaya Cohen
Nutrition Coach
Nutrition Coach
Hodaya guides patients through realistic nutrition strategies that fit their medical plans and daily routines. She emphasizes mindful eating, weekly meal structure, and habit-building so individuals and families can sustain long-term wellness.
Kevin Cedellios
Personal Trainer
Kevin develops customized training plans that balance strength, mobility, and recovery. His coaching style blends functional movement with steady encouragement, keeping clients motivated while preventing injury and promoting confident movement.
Dr. Min Lu
L.Ac., DAOM (candidate)
Dr. Min Lu is a licensed acupuncturist dedicated to providing exceptional acupuncture care tailored to your unique health needs. She integrates traditional Chinese medicine with modern biomedical knowledge to offer comprehensive holistic wellness solutions. Dr. Lu specializes in pain management, fertility treatment, stress management, and a variety of traditional Chinese medicine therapies including cupping and moxibustion. Her approach focuses on treating the whole person, addressing both symptoms and root causes to achieve optimal health and wellbeing.
Dr. Efi Kessous
MD, MPH
Dr. Efi Kessous is a board-certified primary care physician who practices at our urgent care center and serves as a trusted primary doctor at Montgomery Medical Clinic. As a primary care provider, he is also an Assistant Professor and faculty member at The George Washington University School of Medicine & Health Sciences.
As a primary care physician at our urgent center, his clinical interests include procedural family medicine, injury management, women’s health, and occupational medicine. Dr. Kessous is committed to providing comprehensive urgent care and primary care services for individuals and families as their dedicated primary doctor.
He is a member of the American Academy of Family Physicians and serves as a designated FAA aviation medical examiner, bringing a diverse skill set to patient care.
Dr. Bertha Velandia
MD
Dr. Bertha Velandia is an experienced primary care provider and primary doctor who received her medical degree from the Universidad Nacional in Bogota, Colombia in 1983. As a primary care physician, she completed her residency in family medicine at the UAB Huntsville Medical Campus in 2009.
During her distinguished career, Dr. Velandia has received an outstanding award in Obstetrics and Gynecology. She has also dedicated time serving in rural communities and published research on scurvy in developed countries.
As a dedicated primary care physician at our urgent care center, Dr. Velandia brings warmth and experience as a primary doctor, making urgent care and primary care services accessible and compassionate for families in Gaithersburg.
Dr. Sara Brooks
MD, Board Certified Dermatologist
Dr. Sara Brooks is a Board Certified Dermatologist and Maryland native from St. Mary’s County. She attended the Honors college at University of Maryland, College Park, obtaining both a Bachelor’s in Cell Biology and a Master’s in Management and Organization. She went to medical school at Drexel University in Philadelphia, where she was inducted into AOA, the prestigious medical honor society. She completed a medical internship at Thomas Jefferson University and her residency in Internal Medicine and Dermatology at Georgetown University and Washington Hospital Center, where she served as Chief Resident of Dermatology. She also completed a Melanoma Fellowship at the Washington Cancer Institute. She is a Fellow of the American Academy of Dermatology.
Dr. Marsha D. Mitchum
MD, MPH, Board Certified Dermatologist
Dr. Marsha Mitchum is a board-certified dermatologist with extensive experience in medical and oncologic dermatology. Before entering medicine, she served in the United States Air Force as a KC-135 pilot and instructor, completing assignments across Europe and the Pacific. She later transitioned to medicine, serving as a Flight Surgeon and Dermatologist at several major military medical centers. Dr. Mitchum completed her Dermatology Residency with the National Capital Consortium and a Fellowship in Cutaneous Oncology at the Dana-Farber Cancer Institute and Brigham and Women’s Hospital, Harvard University. She also worked as a Medical Officer in the Division of Oncology at the U.S. Food and Drug Administration, where she contributed to national cancer drug evaluation and clinical research oversight. Her clinical interests include general medical dermatology, skin cancer diagnosis and treatment, and complex skin disorders. At Montgomery Medical Clinic Dermatology, Dr. Mitchum is dedicated to providing evidence-based, compassionate care—combining her background in medicine, oncology, and aviation to deliver precise, patient-centered treatment.
Dr. Min Lu
L.Ac., DAOM (candidate)
Dr. Min Lu is a licensed acupuncturist dedicated to providing exceptional acupuncture care tailored to your unique health needs. She integrates traditional Chinese medicine with modern biomedical knowledge to offer comprehensive holistic wellness solutions. Dr. Lu specializes in pain management, fertility treatment, stress management, and a variety of traditional Chinese medicine therapies including cupping and moxibustion. Her approach focuses on treating the whole person, addressing both symptoms and root causes to achieve optimal health and wellbeing.
Hodaya Cohen
Nutrition Coach
Nutrition Coach
Hodaya guides patients through realistic nutrition strategies that fit their medical plans and daily routines. She emphasizes mindful eating, weekly meal structure, and habit-building so individuals and families can sustain long-term wellness.
Kevin Cedellios
Personal Trainer
Kevin develops customized training plans that balance strength, mobility, and recovery. His coaching style blends functional movement with steady encouragement, keeping clients motivated while preventing injury and promoting confident movement.
Dr. Eran Kessous
MD, CAQSM
Dr. Eran Kessous is board certified in both family and sports medicine. He completed his sports medicine training at Harvard Medical School’s Children’s Hospital in Boston. Dr. Kessous received his medical degree from St. George’s University in 1999, completed a surgical internship at Mount Sinai School of Medicine in New York, and after three years as a general and orthopedic surgery resident at Tel Aviv Medical Center, returned to Boston to complete a family medicine residency at Boston University Medical Center. He was an official team physician for the Major League Soccer Team DC United and is currently the medical consultant for the Kirov Academy of Ballet. He is also a clinical assistant professor at Georgetown University School of Medicine.
Dr. Jonathan Lawless
DO, CAQSM
Dr. Lawless is board-certified in family medicine and sports medicine. He completed his sports medicine training and family medicine training at Northwell Plainview Hospital in Plainview, NY. Dr. Lawless graduated from medical school at Lake Erie College of Osteopathic Medicine in 2012 and completed a traditional rotating internship at UPMC Mercy Hospital in Pittsburgh, PA. He was appointed a teaching associate in family medicine at Hofstra Northwell School of Medicine. His experience includes team physician for LIU Post University and medical coverage for marathons and triathlons. His skills include musculoskeletal care, diagnostic musculoskeletal ultrasound, ultrasound-guided injections, and osteopathic manipulative treatment.
Kevin Cedellios
Personal Trainer
Kevin develops customized training plans that balance strength, mobility, and recovery. His coaching style blends functional movement with steady encouragement, keeping clients motivated while preventing injury and promoting confident movement.