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Dr. Serge Lartchenko, MD, is a double board-certified Internal Medicine and Infectious Disease Specialist at Texas Infectious Disease Institute in Richardson, Texas, serving the North Dallas metroplex areas.

He is a caring and thoughtful medical professional who truly believes in whole patient care. He has more than a decade of experience effectively treating orthopedic and surgery-related infections, including those due to spinal instrumentation.

A remarkably trained medical doctor who is called upon to solve and treat cases that have stumped other medical professionals over the years, Dr. Lartchenko must know the entire body intimately. He looks at each patient as a whole person.

He has specialized fellowship training in Infectious Disease from the renowned Louisiana State University Health Sciences Center School of Medicine (LSU Health) in New Orleans, where he was very involved in teaching and presenting rare cases of infectious disease.

Dr. Lartchenko is also highly familiar with epidemiology, studying the patterns, causes, and effects of health and disease conditions in defined populations. He is fluent in English, Arabic, French, Russian, and Spanish.

Certifications and affiliations include:

• Member of the American Board of Internal Medicine (ABIM)
• Certified in Internal Medicine by ABIM
• Certified in Infectious Diseases by the ABIM
• Member of the Infectious Disease Society of America (IDSA)
• Member of the Southern Medical Association (SMA)
• Serves on the infection control team and antibiotic stewardship program for the Methodist Healthcare System
• Trained at nationally recognized HIV Outpatient Program Clinic (HOP) in New Orleans

He has contributed to countless publications and abstracts, including The Initial Approach to the HIV-infected Patient, Care, and Management of the Patient with HIV Disease; Delta Region AIDS Education & Training Center; Medical Center of Louisiana in New Orleans.

Dr. Lartchenko was named Best Doctor in Dallas in 2018, 2019, 2020, 2021, and 2002 by D Magazine.

Priyasheelta (Priya) Nand, MD, is an infectious disease specialist with Touro University Medical Group. In addition, she is a faculty member of Dignity Health St. Joseph’s Medical Center’s Internal Medicine graduate medical education program.

Dr. Nand's goal is to provide compassionate care in the treatment of infectious diseases. She earned her Doctor of Medicine at St. George’s University in Grenada. She then completed her internship and residency at San Joaquin General Hospital in Stockton, California, and her fellowship at Davis Medical Center in Sacramento.

Dr. Nand is board-certified by the American Board of Internal Medicine and the American Board of Infectious Disease.

At Touro University Medical Group, Dr. Nand treats many infectious diseases, including fungal and myobacterial infections.

Outside of the office, her hobbies include reading, decorating, running, and traveling.

Dr. Nand is currently accepting new patients. 

Nathaniel Defelice, MD, is a skilled Critical Care Medicine and Infectious Disease Medicine Specialist at Pulmonary Medicine Associates. Dr. Defelice works alongside a team of Pulmonary, Critical Care, and Sleep Medicine Specialists and provides excellent care to all his patients from PMA's Sacramento, California office.

He earned his Bachelor of Arts at Pomona College in Claremont, California, followed by a Doctor of Medicine at Ben-Gurion University of the Negev-Faculty of Health Sciences (BGU) in Beer-Sheva, Israel.

Dr. DeFelice carried on as a Resident in Internal Medicine at the University of New Mexico Hospitals in Albuquerque, New Mexico, followed by a Fellowship in Infectious Disease at the University of California Davis Medical Center in Sacramento, California, and a Fellowship in Critical Care Medicine also at UC Davis Medical Center.

His certifications and professional associations include:

• Diplomate, Subspecialty Board of Critical Care Medicine
• Diplomate, Subspecialty Board of Infectious Disease
• Diplomate, American Board of Internal Medicine
• California State Physician and Surgeon License

• Sierra Sacramento Valley Medical Society
• Infectious Disease Society of America

Dr. DeFelice joined Pulmonary Medicine Associates (PMA) in 2019 after completing his Fellowships.

Bilal Naseer, MD, FCCP, is a board-certified physician at Pulmonary Medicine Associates in Roseville, California. He’s been with the practice since 2010 and specializes in critical care and infectious disease medicine.

Dr. Naseer earned his medical degree from Rawalpindi Medical College in Pakistan. After graduation, he moved to the United States and completed his residency in internal medicine at Columbia University’s Harlem Hospital Center in New York City.

After his residency, Dr. Naseer completed two fellowships. He was a fellow in infectious disease at the University of Rochester’s Strong Memorial Hospital and Rochester General Hospital in New York. His second fellowship was in critical care medicine at Stanford University, where he worked at Stanford Hospital, the VA Palo Alto Healthcare System, and Santa Clara Valley Hospital in Stanford, California.

Dr. Naseer has several certifications. He’s a diplomate with the American Board of Internal Medicine, the Subspecialty Board of Infectious Disease, and the Subspecialty Board of Critical Care Medicine. 

Dr. Naseer is an active member of the medical community, and his leadership positions include lead physician at Dignity Health Antibiotic Stewardship Task Force, and a fellow of the American College of Chest Physicians, to name a few. 

Along with his leadership roles, Dr. Naseer is a member of the American College of Physicians, the Society of Critical Care Medicine, the Infectious Disease Society of America, the American Medical Association, and the Sierra Sacramento Valley Medical Society (SSVMS).

When he’s not with patients, Dr. Naseer enjoys exercise. He’s an athlete who loves both outdoor sports and working out at the gym.

Randy Martin, MD, FACP, FCCP, is an infectious disease and wound care specialist practicing at Pulmonary Medicine Associates in Roseville, California. After spending some time as a sewage plant operator in Alaska, he decided to pivot to a career in medicine because of his desire to make a positive difference for people with complex infections and pulmonary problems. 

Dr. Martin earned his bachelor’s degree from Columbia University in Manhattan, New York City, before moving to Seattle, Washington, to earn his medical degree at the University of Washington. He completed an internal medicine internship at the University of California, Davis, as well as a residency and fellowships in infectious diseases and pulmonary and critical care. 

Throughout his career in medicine, Dr. Martin has held multiple leadership roles, including medical director at Sutter Roseville Medical Center in Roseville, California, and chair of the pharmacy and therapeutics committee, also at Sutter Roseville Medical Center. He’s a diplomate of the American Board of Internal Medicine as well as the Subspecialty Board of Pulmonary Medicine. 

Multiple professional memberships allow Dr. Martin to offer his patients advanced care using the latest treatments and protocols. He’s an active member of the American Medical Association, the California Medical Association, the American Thoracic Society, the Sierra-Sacramento Valley Medical Society, and the Sacramento/El Dorado County Medical Association. He’s also a Fellow of the American College of Physicians and the American College of Chest Physicians.

At Pulmonary Medicine Associates, Dr. Martin routinely treats complicated wounds and wound infections using the latest and most effective modalities.

Outside of work, Dr. Martin enjoys outdoor activities like photography and hiking. He spends much of his time with his wife, who also works in health care as a physical therapist, and coaches high school wrestling at Foothill High School in Sacramento, California. 

Daniel Ikeda, MD, FCCP, specializes in critical care, pulmonology, and infectious diseases at Pulmonary Medicine Associates in Sacramento, California. He’s always had a deep interest in science and thrives in a career that allows him to use his medical expertise along with his problem-solving skills. He enjoys working with his team to provide patients with top-of-the-line care at Pulmonary Medicine Associates. 

Dr. Ikeda earned his medical degree from the University of Washington in Seattle. During his pulmonary diseases fellowship at the University of California Davis School of Medicine, he was also an instructor in internal medicine. He stayed there to complete a second fellowship in infectious diseases. He then moved to Honolulu, to complete his residency and internship at the University of Hawaii. 

Dr. Ikeda is a diplomate of the American Board of Internal Medicine, the Subspecialty Board of Infectious Diseases, the Subspecialty Board of Pulmonary Medicine, and the Subspecialty Board of Critical Care Medicine. He holds multiple professional memberships to stay abreast of the latest information within her specialties, including memberships with the California Medical Association, the Alpha Omega Alpha Medical Society, the Infectious Diseases Society of America, and the Sierra Sacramento Valley Medical Society. He’s also a Fellow of the American College of Chest Physicians. 

When he’s not at Pulmonary Medicine Associates providing telemedicine evaluations or treating complex infections, Dr. Ikeda enjoys spending time with his wife and children. He adores living close to beautiful areas like Lake Tahoe and Napa, California. 

Vinod Trivedi, MD, is a board-certified physician at Pulmonary Medicine Associates in Sacramento, California. He joined the practice in 2012, specializing in infectious disease and travel medicine.

Dr. Trivedi earned his Bachelor of Medicine and Bachelor of Surgery (MBBS) from Patna Medical College and Hospital in Patna, India. He continued his education at the same school and completed his internship and first internal medicine residency there. Dr. Trivedi completed his second residency in psychiatry at the Ranchi University Central Institute of Psychology in Ranchi, India.

After his residency, Dr. Trivedi moved to the United States. He completed an internship and residency in internal medicine at the Texas Tech University Health Science Center in Odessa and a fellowship in infectious disease at the University of Texas Medical Branch in Galveston.

Dr. Trivedi is a diplomate with the American Board of Internal Medicine and the Subspecialty Board of Infectious Disease. At Pulmonary Medicine Associates, he strives to provide exemplary care for patients living with infectious diseases affecting their pulmonary system.

Dr. Trivedi is a member of several professional organizations, including the Infectious Diseases Society of America, the American Medical Association, and the American College of Physicians.

Richard Defelice, MD, MPH, is an experienced Physician specializing in Pulmonary Medicine, Critical Care Medicine, and Infectious Disease at Pulmonary Medicine Associates. Dr. Defelice joined PMA in September 1982, and he provides exceptional care to all patients alongside a team of Pulmonary, Critical Care, and Sleep Medicine Specialists.  

Since September 1982, Dr. Defelice has served as Staff Physician at Mercy General Hospital in Sacramento and as Chair Antibiotic Control Committee since 1985. In addition, he has held the following positions at Methodist Hospital in Sacramento:

• Medical Director of Infection Control, 1985 to Present
• Chair, Infection Control Committee, 1985 to Present
• Chair, Department of Medicine
• Chair, Pharmacy and Therapeutics Committee, 1985 to Present
• Chief of Staff
• Vice Chief of Staff
• Chair, Quality Assurance Committee
• Member, Investigational Review Board
• Member, Critical Care Committee

He also worked as Staff Physician at Sutter Medical Center Sacramento (Sutter General and Sutter Memorial Hospitals) in Sacramento, California, as: 

• Medical Director of Infection Control, 1989 to Present
• Chair, Infection Control Committee, 1985 to Present
• Chair, Pharmacy and Therapeutics Committee, 1995 to Present
• Section Chief, Department of Pulmonary Medicine
• Chair, Antibiotic Control Committee

Certifications include:

• Diplomate, American Board of Internal Medicine
• Diplomate, Subspecialty Board of Infectious Disease
• Diplomate, Subspecialty Board of Pulmonary Medicine
• Diplomate, Subspecialty Board of Critical Care Medicine
• Diplomate, National Board of Medical Examiners, Parts I, II, III

Dr. Defelice has participated in numerous clinical trials for the treatment of pulmonary and infectious diseases. He is a frequent lecturer on various topics at the Dignity Health Family Practice Residency program and other physician groups.

When Dr. Defelice is not working (he is a fixture at Methodist Hospital of Sacramento), he adores spending time with his wife, four great kids, and grandchildren.

Dr. DeFelice is an avid golfer who enjoys international travel, reading, and politics.

Ranjani Kalyan, MD, is an infectious disease and wound care specialist at Pulmonary Medicine Associates in Roseville, California. She’s fascinated with infectious diseases and has a passion for managing and resolving them in her own community. She routinely treats complex cases of post-operative infections, endocarditis, osteomyelitis, and staph infections using personalized treatments. 

Dr. Kalyan attended the University of Florida in Gainesville, Florida, for her undergraduate education before earning her medical degree from Ross University of Medicine in Portsmouth, Dominica. She then completed her internal medicine residency at Mercy Hospital and Medical Center in Chicago, Illinois. She was chief resident during her final year and went on to complete a fellowship in infectious diseases at Loyola University Medical Center in Maywood, Illinois. 

Throughout her education and career, Dr. Kaylan has earned numerous awards for her exceptional research, leadership, and humanitarianism. She’s a diplomate of the American Board of Internal Medicine and the Subspecialty Board of Infectious Disease. She also holds memberships in the Infectious Diseases Society of America and the American College of Physicians. 

Dr. Kalyan values her position on the team at Pulmonary Medicine Associates and is continuously fascinated by uncommon diseases and their treatments. Outside of work, she spends her free time playing sports with her children, attending comedy shows, cooking ethnic foods, and dabbling in classical Indian music and dance.

Meryl Perez, MD, is a board-certified physician at Pulmonary Medicine Associates in Roseville, California. She joined the team in 2015, and she specializes in infectious diseases.

Dr. Perez earned her dual Bachelor of Science in biology and chemistry from Pittsburg State University in Pittsburg, Kansas. She attended Case Western Reserve University School of Medicine in Cleveland, Ohio, and graduated with her Doctor of Medicine.

After graduating, Dr. Perez completed her internship and residency in internal medicine at the University of Alabama at Birmingham. She completed her fellowship in infectious diseases at the University of California Davis Medical Center in Sacramento before beginning her work in private practice.

Dr. Perez is a diplomate with the American Board of Internal Medicine and the Subspecialty Board of Infectious Disease. She works with adult patients of all ages to diagnose and treat infectious diseases, helping them enjoy better health in their daily lives.

Alongside her work at Pulmonary Medicine Associates, Dr. Perez is active in the medical community. She is an assistant clinical professor at UC Davis Medical Center, Division of Infectious Diseases, and a member of the Infectious Diseases Society of America, Northern California Infectious Disease Society, and the Greater Sacramento Epidemiology Association.

On the weekends, Dr. Perez enjoys spending time with her family and exploring all Northern California offers.