Our Porter Ranch Physicians
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Primary Care
Jeff Borenstein, MD |
Watch Video Internal Medicine Dr. Jeff Borenstein graduated from the Mount Sinai Medical School, completed internal medicine residency and fellowships in general internal medicine and health services research at the Cedars-Sinai Medical Center, and obtained a Master’s degree in Public Health from UCLA. He is board-certified in both Internal Medicine and Medical Informatics and is a Fellow of the American College of Physicians. His primary interests are in team-based, interdisciplinary care, primary and secondary prevention through the application of evidence-based medicine, and quality improvement facilitated by electronic health records. More >
Allison Lowe Guimera, MD |
Watch Video Pediatrics Dr. Guimera received her medical degree from West Virginia University School of Medicine. She completed her training in pediatrics at UCLA Mattel Children's Hospital and served as a Pediatric Hospitalist for three years at UCLA Mattel Children's Hospital and UCLA Medical Center, Santa Monica. She is currently an Assistant Clinical Professor in Pediatrics at the David Geffen School of Medicine at UCLA. She is a board certified pediatrician and a fellow of the American Academy of Pediatrics. She has been involved in teaching nurses, medical students, and residents and she serves as a mentor for medical students at David Geffen School of Medicine at UCLA. Dr. Guimera is a skilled, caring pediatrician who seeks to provide the highest quality primary care to children in her local community of Porter Ranch. She provides preventative well care and sick care to her patients from birth through adolescence using the most up-to-date evidence based medicine. As a pediatrician and mother herself, she understands the challenges of being a parent and raising healthy and happy children. Her interests outside of medicine include running, yoga, hiking, cooking and spending time with her husband and daughter.
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David Gunn, MD |
Watch Video Family Medicine Dr. David Gunn decided to pursue medicine after working with refugees from Afghanistan and witnessing the impact medical care can have. He attended the University of Oregon, where he earned a Bachelor of Science in Electronic Music, and also studied computer science and clarinet performance. He then earned a Masters of Fine Arts in Electronic Music and Recording Media at Mills College in San Francisco. After pursuing a technology career in Silicon Valley, Dr. Gunn returned to school to study medicine at the University of California, Davis. He completed his family medicine residency in Redding, California. Proficient in Spanish, Dr. Gunn’s clinical interests include addiction, buprenorphine maintenance, and minor surgical procedures.
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Nicole Militello, MD |
Watch Video Pediatrics Dr. Militello received her undergraduate degree from Stanford University. She attended medical school at the David Geffen School of Medicine at UCLA and was elected into the Alpha Omega Alpha medical honor society. She completed her residency in pediatrics at UCLA Mattel Childre]n's Hospital and was a Pediatric Hospitalist for three years at UCLA Mattel Children's Hospital and UCLA Santa Monica. She is passionate about providing comprehensive pediatric care to the Porter Ranch community. Dr.
Militello is an Assistant Clinical Professor and enjoys contributing to medical education by teaching residents and mentoring medical students. She is board certified in Pediatrics and a fellow of the American Academy of Pediatrics. In her free time, she enjoys running and has completed several marathons. She also loves the beach and spending time with her family and friends.
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Alina Katsman, MD |
Watch Video Family Medicine Dr. Alina Katsman was raised in Los Angeles. She studied microbiology, immunology, and molecular genetics and earned her Bachelor of Science degree from UCLA. She went on to earn her medical degree from the David Geffen School of Medicine at UCLA followed by an internship and residency in Family Medicine at UCLA. Dr. Katsman's interests include pediatrics, adolescent health, and women's health.
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Dr. Renata Stankovic is a primary care physician who practices in Porter Ranch. Her clinical interests include preventive medicine and managing chronic medical conditions through effective physician-patient collaboration and shared decision making. She is board certified in internal medicine. More >
Shirley Uy, MD Family Medicine Dr. Shirley Uy earned her medical degree at UCLA School of Medicine. She completed her internship and residency in family practice at UCLA School of Medicine. Dr. Uy's clinical interest is women's health.
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Specialty Care
Juan Alcantar, MD Hematology & Oncology Dr. Juan M. Alcantar grew up in Oxnard. He attended the David Geffen School of Medicine at UCLA and completed an internal medicine residency at Olive View-UCLA Medical Center. His medical oncology and hematology fellowship was completed at Harbor-UCLA and City of Hope Medical Centers. Prior to completing his fellowship, Dr. Alcantar practiced ambulatory and hospital medicine in Sherman Oaks, California. He was in private practice in hematology/oncology from 2011-2015. Dr. Alcantar is board- certified in internal medicine as well as hematology and oncology. He regularly participates in multi-disciplinary tumor boards to provide optimal and up-to-date treatments for his patients. He is dedicated to providing comprehensive medical care with quality and compassion to his patients. Dr. Alcantar enjoys his spare time with his wife and two sons. He also enjoys soccer and reading on the history of medicine.
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Dr. Peyman Azadani is a faculty member of the David Geffen School of Medicine as a Clinical Instructor of Cardiovascular Medicine at UCLA. More >
Chidinma Chima-Melton, MD Pulmonary & Critical Care MedicineDr. Chidinma Chima-Melton received her medical degree from Stony Brook University School of Medicine, New York. She completed her training in Internal Medicine at Yale University in New Haven, Connecticut. She then made the move to the west coast for fellowship in Pulmonary and Critical Care Medicine at Cedars-Sinai Medical Center in Los Angeles. Following her fellowship, she joined UCLA Health. Dr. Chima-Melton’s interests include Interstitial Lung Disease (ILD), Occupational and Environmental lung diseases.
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Fukai Leo Chuang, MD Hematology & Oncology Dr. Fukai Leo Chuang earned his medical degree at Rosalind Franklin University of Medicine and Science/Chicago Medical School. He completed his residency in internal medicine at Cedars-Sinai Medical Center. Dr. Chuang then completed a fellowship in Hematology and Medical Oncology at Harbor-UCLA Medical Center. He treats a variety of conditions from benign hematology disorders to different types of cancer. He strives to deliver compassionate and excellent care to his patients and their families. Dr. Chuang puts great emphasis on providing the best treatment options and improving the quality of lives of his patients.
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Melissa J. Cohen, MD Hematology & Oncology Dr. Melissa J. Cohen is assistant clinical professor of medicine at the David Geffen School of Medicine at UCLA and a board certified medical oncologist practicing at UCLA Hematology/Oncology in Westlake Village and Porter Ranch. She began her medical training at George Washington University in Washington D.C., and then moved to Denver where she completed her internal medicine residency training at the University of Colorado. In 2008, she relocated to Southern California to complete her fellowship training in both geriatrics and medical oncology at UCLA.
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Sheldon Davidson, MD Hematology & Oncology Dr. Sheldon Davidson is a graduate of ALBERT Einstein College of Medicine in New York, training at Mount Sinai Medical Center in NY and LACounty/USC MedCenter in Los Angeles. He has been in the private practice of Hematology/Oncology for 43 years and a member of the UCLA clinical faculty since 1972, participating in teaching, mentoring, and clinical research.
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John Glaspy, MD Hematology & Oncology Dr. Glaspy is a member of the American Society of Clinical Oncology, Southwest Oncology Group, American Federation for Clinical Research, International Society of Interferon Research, and American Society of Nuclear Medicine, among others. He is also a fellow of the American College of Physicians. During the course of his career, Dr. Glaspy has authored more than 270 articles, abstracts, and book chapters. He has received numerous awards and honors, including being named one of the "Best Doctors in America." Currently, Dr. Glaspy is involved in basic research in tumor immunology and the effects of fatty acids on carcinogenesis. His clinical interests also include chemotherapy-induced anemia, the role of hematopoietic growth factors in cancer management, and new approaches to the treatment of breast cancer and malignant melanoma.
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Dr. Brandon Grimes is a pulmonologist and critical care physician who practices in Beverly Hills, Burbank, Westwood and Porter Ranch. He also provides consultations and critical care services to patients hospitalized in Ronald Reagan UCLA Medical Center, UCLA Medical Center, Santa Monica, and Providence Little Company of Mary Medical Center Torrance. He is board certified in internal medicine, pulmonary disease and critical care medicine, and has expertise in COPD/emphysema, bronchiectasis, lung nodules and lung cancer. More >
David Kim, MD Hematology & Oncology Dr. David Kim is a Southern California native, who graduated summa cum laude from UCLA with a bachelor’s degree in Biology. He earned his medical degree at USC Keck School of Medicine and completed his internship and residency in Internal Medicine at UCLA Medical Center. Dr. Kim continued on to complete his Hematology/Oncology fellowship training at UCLA Medical Center. Dr. Kim is a board certified hematologist and medical oncologist who practiced his specialty for 6 years at the award-winning Leavey Cancer Center in Northridge prior to joining UCLA Health in Porter Ranch.
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Yuliya Krokhaleva, MD Cardiology Dr. Krokhaleva earned her medical degree from St. Petersburg Pavlov State University in St. Petersburg, Russia. She completed residency in Internal Medicine at the State University of New York in Buffalo, NY. Dr. Krokhaleva finished her fellowship training in Cardiovascular Diseases at the Mayo Clinic in Rochester, MN. She completed fellowship in Clinical Cardiac Electrophysiology at the University of California, Los Angeles. Dr. Krokhaleva’s clinical interests include all aspects of arrhythmia management with particular emphasis on cardiac catheter ablation of atrial and ventricular arrhythmias as well as cardiac implantable devices. Dr. Krokhaleva’s patient care philosophy stems from the words of Dr. William J. Mayo that “the best interest of the patient is the only interest to be considered…”
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Dr. Lisa Little is a native of Southern California, practicing in the San Fernando Valley since 2007. Dr. Little earned her medical degree at Ross University School of Medicine in New York and completed her internship at Geisinger Health System in Pennsylvania. She completed her residency in Ob/Gyn at Southern Illinois School of Medicine in Springfield where she served as Chief Resident and received numerous honors for her ovarian cancer research. More >
Jelena Maletkovic, MD Endocrinology Dr. Jelena Maletkovic earned her medical degree at the University of Belgrade. She completed her internship, residency and served as Chief Resident in internal medicine at Interfaith Medical Center in Brooklyn, New York. Dr. Maletkovic completed fellowship training in endocrinology, diabetes and metabolism at the David Geffen School of Medicine at UCLA. Dr. Maletkovic's clinical interests and research publications include thyroid, parathyroid and pituitary disorders as well as diabetes mellitus, adrenal disorders and reproductive endocrinology. In her free time she enjoys classical piano playing and traveling with her family.
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Masoom Modi, MD Rheumatology Dr. Masoom Modi completed her rheumatology training at Cedars-Sinai Medical Center. Originally from Northern California, she obtained her bachelor’s degree at the University of California at Berkeley. She attended medical school at St. George’s University School of Medicine, and completed internal medicine training at Maricopa Medical Center. Dr. Modi is an active member of the American College of Rheumatology. She enjoys participating in teaching activities with first year medical students at the David Geffen School of Medicine at UCLA. Outside of work, she enjoys spending time with her husband and dog.
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Dr. Philipp graduated Phi Beta Kappa from University of California San Diego and then completed medical school at the University Of Illinois College Of Medicine at Rockford where she was elected into the Alpha Omega Alpha medical honor society. Dr. Philipp completed residency in Internal Medicine at UCLA followed by Allergy/Immunology fellowship at the West Los Angeles VA that included pediatric training at CHLA. Her love of Allergy/Immunology developed in medical school when she worked with high-risk teens with asthma. Dr. Philipp sees patients of all ages and has a special interest in managing food and drug allergy as well as allergic rhinitis and asthma. More >
Brendan Riley, DPM Podiatry Dr. Brendan M. Riley is Board Certified by the American Board of Podiatric Surgery in foot and reconstructive rearfoot/ankle surgery. In 2005, he completed four years of surgical residency training at the West Los Angeles VA, Olive View/UCLA Medical Center and Century City Hospitals. He then joined the University Podiatry Group at UCLA and is currently seeing patients at both the Westwood and Santa Monica offices. He is also a part-time Consulting Physician at the UCLA Arthur Ashe Student Health and Wellness Center and at Olive View/UCLA Medical Center where he enjoys being involved in resident education. His training and professional interests are in foot and ankle trauma, reconstructive surgery and diabetic foot care.
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Dr. Dolly Roy is a board-certified general neurologist and clinical specialist in treating Multiple Sclerosis. Growing up between the Midwest and California, she graduated summa cum laude with a major in Biochemistry and minor in Russian from Washington University in St. Louis where she was in the Scholars Program in Medicine. Dr. Roy continued in the Medical Scientist Training Program at Washington University School of Medicine earning her MD and PhD degrees and solidifying an interest in analytical and compassionate individualized medical care. She completed her Neurology residency at Stanford University School of Medicine where she developed her interests of trying to understand the intersection between coagulation and immunity with ongoing novel research. Dr. Roy has practiced in the San Fernando Valley for more than a decade, has served as the Stroke Director at Northridge Hospital, and is in the process of developing a set of blood tests to predict and track multiple sclerosis relapses and recovery. More >
Dr. Shah earned her bachelor's degree at Stanford University and her medical degree at USC School of Medicine (Alpha Omega Alpha honor society). She completed her internship and residency in internal medicine at UCLA School of Medicine followed by her fellowship in cardiovascular disease at Kaiser Permanente Los Angeles Medical Center (LAMC). Dr. Shah is board certified in Cardiovascular Diseases, Echocardiography, and Nuclear Cardiology. More >
Dr. Gregory Senofsky is a board-certified, fellowship-trained surgical oncologist with special expertise in breast and melanoma surgery. He sees patients for consultations in Santa Clarita, Porter Ranch and Encino, and performs surgery at nearby community hospitals and at Ronald Reagan UCLA Medical Center. More >
Dr. David Shin attended medical school at Northwestern University in Chicago. He completed internal medicine residency at University of Massachusetts and fellowship in hematology and medical oncology at the David Geffen School of Medicine at UCLA. He is board-certified in internal medicine, hematology and medical oncology. He treats benign and malignant conditions of hematology as well as various cancers. He endeavors to provide compassionate care.
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Simi Singh, MD Digestive Diseases Dr. Singh attended Drexel University where she completed a combined BS in biology/MD program. During her time in Philadelphia, she was actively involved in coordinating volunteer services for women's community clinics. She completed her residency in internal medicine as well as her fellowship in gastroenterology at Mount Sinai Beth Israel in New York. During her training, she developed a particular interest in women's gastrointestinal health and hepatology.
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Anna Skay, MD Digestive Diseases Dr. Anna Skay is a gastroenterologist who practices in Porter Ranch & Santa Clarita. She is board certified in internal medicine and gastroenterology. She practices general gastroenterology and has clinical interest in gastroesophageal reflux disease (GERD), peptic ulcer disease, gastrointestinal tract bleeding, colon cancer screening, irritable bowel syndrome, chronic constipation and gastrointestinal endoscopy.
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Dr. Anita Tipirneni is board certified in Neurology and has particular clinical interests in neurohospitalist care, stroke, and vascular malformations. She has specialized training in intracranial Doppler ultrasound, acute and chronic stroke management, and clinical research. She has advanced skills in Spanish and welcomes the opportunity to interact with Spanish speaking patients. More >
Porter Ranch Hematology Oncology physicians are located in the same building in Suite 310 >
