Dr. James Ley was born and raised in a suburb of Philadelphia. After high school, he studied at Pillsbury College, earning a Bachelor’s degree in Biblical Studies, Greek, and Pastoral Studies. In 1983, Dr. Ley received a B.S. degree in Chemistry and Biology at West Chester University. He continued his education at Pennsylvania State University College of Medicine at Hershey Medical Center, where he earned his M.D. degree in 1987. Dr. Ley returned to Philadelphia for his Internal Medicine residency at Pennsylvania Hospital, followed by an Infectious Disease Fellowship, completed in 1992, at The University of Pennsylvania Hospital. Highlights of his medical education included training electives in Kenya and Uganda, which provided experience in both tropical medicine and mission’s work. His interest in missions also led him to provide general medical care for residents at a faith-based drug rehab center in Philadelphia.

Dr. Ley came to the Delmarva area in 1992, establishing medical practice at Union Hospital in Elkton, Christiana Hospital, Wilmington Hospital, and Saint Francis Hospital. Now in his 25th year of practice, Dr. Ley is a fellow of the American College of Physicians and maintains certification in Infectious Diseases by The American Board of Internal Medicine. Additionally, he is credentialed by Healogics Wound Care for wound care treatment. Since 1999, he has been a wound care physician; previously at Christiana Care and currently at The Union Hospital Would Care Center. Dr. Ley has also served as Chair of Medicine at Union Hospital, and in 2014, he was honored with the Physician of the Year award, by the Union Hospital medical staff. Since 1992, he has treated tuberculosis patients, as chest clinic physician for the Cecil County Health Department.

Dr. Ley is married and has two children. When he is not working, he enjoys fishing, hiking, volunteer work at his church, playing the piano, organ, accordion, and singing.
Dr. Wesley Emmons practiced internal medicine for 4 years before completing an Infectious Diseases Fellowship at the National Naval Medical Center in Bethesda MD. After serving a 1 year stint as a co-instructor at the US Navy’s Tropical Medicine School in San Juan, Puerto Rico, he did a 6 year tour as the Infectious Diseases and HIV Division Head at the Naval Medical Center in Portsmouth VA. During his 13 years as a Naval physician, he lived in Puerto Rico and Cairo Egypt, and did tours of duty in Brazil and the Dominican Republic; his overseas experience allowed him to qualify and pass the ASTMH’s Certificate of Knowledge in Clinical Tropical Medicine and Traveler’s Health.He is a Fellow of the ACP and has published 20 manuscripts, written over 7 chapters, and edited numerous articles and 10 chapters for eMedicine and 4 other medical journals. He has written Board questions for the ABIM’s Infectious Disease exam, the ASTMH’s Certificate of Knowledge exam, and the MKSAP. He was voted “Teacher of the Year” 3 times in his career, has been selected as a Delaware “Top Doc” over 5 different times, and is widely sought after for his informative and entertaining lectures. In 2004 he was selected for Christiana Care’s Maxwell Award for compassionate patient care. He has been back in Delaware since 2001 where he enjoys spending time with his wife, children, and grandchildren. Hobbies include SCUBA diving and going to the gym; the youngest participant to complete the New York Marathon in 1973, he once ran 100 miles in 23 hours (at the time a US record for a 21 year old); on another occasion, he did 1,111 situps. He is also known throughout the hospital for his colorful outfits, specifically “Wacky Pants Wednesday” and “Hawaiian Shirt Friday”.
Home Our Team Appointments Infusion Center Contact

Meet Our Team

Our group has cared for patients from the Delaware and northern Maryland area for over 20 years. We currently have 6 ABIM board-certified infectious disease specialists.

Our group is experienced in treating complicated infections such as MRSA and drug resistant bacterial infections, bone infections (osteomyelitis), heart infections (endocarditis), tick-borne infections, post-op infections, and many more. Within our group there is additional individual expertise or certification for specialized care of wounds, recurrent Clostridium difficile infections who need referral for fecal microbiota transplant, and travel medicine. We hope that infections do not become a health concern for any, but our caring physicians are here to help if the need arises.

James S. Ley, MD

About Education Training Licenses
Dr. James Ley was born and raised in a suburb of Philadelphia. After high school, he studied at Pillsbury College, earning a Bachelor’s degree in Biblical Studies, Greek, and Pastoral Studies. In 1983, Dr. Ley received a B.S. degree in Chemistry and Biology at West Chester University. He continued his education at Pennsylvania State University College of Medicine at Hershey Medical Center, where he earned his M.D. degree in 1987. Dr. Ley returned to Philadelphia for his Internal Medicine residency at Pennsylvania Hospital, followed by an Infectious Disease Fellowship, completed in 1992, at The University of Pennsylvania Hospital. Highlights of his medical education included training electives in Kenya and Uganda, which provided experience in both tropical medicine and mission’s work. His interest in missions also led him to provide general medical care for residents at a faith-based drug rehab center in Philadelphia. Read More
B.A. Pillsbury Colege, Owatonna, MN. 1981

B.S. West Chester university, PA. 1983

M.D. Pennsylvania State University, Milton S Hershey Medical Center, Hershey, PA. 1987.
1987-1990: Internship and Residency in Internal Medicine, Pennsylvania Hospital, Philadelphia, PA

1990-1992: Fellowship in Infectious Diseases, Unversity of Pennsylvania, Philadelphia, PA
Currently Licensed in Maryland and Delaware

FACP (fellow of American college of physicians) 2015

Physician of the Year, Union Hospital of Cecil County, 2014

Wesley W. Emmons III, MD

About Education Training Licenses
Dr. Wesley Emmons practiced internal medicine for 4 years before completing an Infectious Diseases Fellowship at the National Naval Medical Center in Bethesda MD. After serving a 1 year stint as a co-instructor at the US Navy’s Tropical Medicine School in San Juan, Puerto Rico, he did a 6 year tour as the Infectious Diseases and HIV Division Head at the Naval Medical Center in Portsmouth VA. During his 13 years as a Naval physician, he lived in Puerto Rico and Cairo Egypt, and did tours of duty in Brazil and the Dominican Republic; his overseas experience allowed him to qualify and pass the ASTMH’s Certificate of Knowledge in Clinical Tropical Medicine and Traveler’s Health. Read More
B.S. Ursinus College, Collegeville, PA. 1981

M.D. Pennsylvania State University, Milton S Hershey Medical Center, Hershey, PA. 1985
1985-1988. Internship and Residency in Internal Medicine. Medical Center of Delaware, Wilmington, DE

1992-1994. Fellowship in Infectious Disease, National Naval Medical Center, Bethesda, MD.
Voted one of best infectious disease doctors in Delaware, by Delaware Today, 2016, etc

Currently licensed in Maryland and Delaware and Pennsylvania

Certificate of Knowledge in Clnical Tropical Medicine and Traveler’s Health by American Society of Tropical Medicine and Hygiene. 12/6/1997.

Member of IDSA, ACP, Medical Society of Delaware, AMA

Chad Duffalo, MD, MPH

About Education Training Licenses
Dr. Chad Duffalo started his professional career in pharmacy, working as a registered pharmacist for several years before pursuing his medical degree and Internal Medicine training at Temple University in Philadelphia, PA. He went on to obtain his Infectious Disease training at Tufts University in Boston, MA. As part of specialized training, he completed an additional Masters in Public Health degree, and helped conduct and publish original research on intestinal microbiota. He continues to have an interest in intestinal microbiota, and helps conduct the Christiana Care Health System Fecal Microbiota Transplant program. He has been regularly sighted on the list of "Top Docs" as seen in the Delaware Times, a list voted on by his peers. His experiences in medicine also include studying tropical infectious diseases in Peru, as well as volunteering in Kenya. On a personal note, he has a love of competing in sports, and has endured numerous competitions from marathons to extreme biking races. He has made Delaware his home since 2013, where he enjoys spending time with his family, and continuing to pursue outdoor and sporting adventures.
B.S. University of Pittsburgh School of Pharmacy, Pittsburgh, PA

M.D. Temple University school of Medicine, Philadelphia, PA

MPH Tufts University School of Medicine, Boston, MA
2005-2008 Internship and residency in Internal Medicine, Temple University Hospital

2009-2012 Fellowship in Infectious Diseases, including Research Year, Tufts Medical Center
Currently licensed in Maryland and Delaware

Certified by ABIM for ID in 2011

Member of IDSA, Medical Society of Delaware

T. Reena Mascarenhas, MD

About Education Training Licenses
Dr Mascarenhas was born and raised in India. She attended the well-respected Madurai Medical College, where she earned her medical degree. Driven by her interest in further education abroad, she moved to the United States. She completed her residency training in Internal Medicine at Christiana Care Hospital, and went on to complete a fellowship in Infectious Diseases at Thomas Jefferson University Hospital in Philadelphia. After graduating from Fellowship, she has returned to serve the local community in Delaware and the Christiana Care Health System. She holds a particularly interest in serving the HIV community, and has expertise in treating co-infected HIV patients with Hepatitis C virus. She is interested in Global antibiotic stewardship as well.
2002-2008: Madurai Medical College & Government Rajaji HospitalM

2009 Granted Bachelor of Medicine & Bachelor of Surgery (MBBS) from Tamil Nadu Dr. M.G.R. Medical University
2011-2014 internship and residency in Internal Medicine at Christiana Care Health Services in Newark, DE

2015-2017 Fellowship in Infectious Diseases at Thomas Jefferson University Hospital in Philadelphia, PA
Currently licensed in Maryland and Delaware.

Certified by ABIM for Infectious Diseases in 2017

Member of IDSA and American Medical Association.

Renaldo Neeley, MD

About Education Training Licenses
Dr. Neeley was born and raised in Nassau, Bahamas. He graduated Magna Cum Laude from Elmira College with his Bachelor of Science in Biology. He is a graduate of Ross University School of Medicine. He completed an Internal Medicine Residency at SUNY Downstate Medical Center in Brooklyn, New York and completed his Infectious Disease fellowship at the University of Maryland Medical Center in Baltimore, Maryland. After his fellowship, Dr.Neeley practiced for several years in North Carolina, then relocated to Delaware in 2023 which is when he joined ID Consultants. Dr Neeley’s interests include opportunistic infections, Non-Tuberculosis Mycobacterium infections and prosthetic joint infections. In his free time, Dr. Neeley enjoys traveling, theater and physical fitness.
B.S. Elmira College, Elmira NY. 2010 M.D. Ross University School of Medicine, Dominica West Indies. 2015
2015-2018 Internship and Residency in Internal Medicine SUNY Downstate Medical Center, Brooklyn, NY 2018-2020 Fellowship in Infectious Disease, University of Maryland Medical Center, Baltimore, MD
Currently Licensed in Maryland and Delaware.

Certified by ABIM for Infectious Disease 2020.

Member of IDSA and American Medical Association.

James S. Ley, MD

About

Dr. James Ley was born and raised in a suburb of Philadelphia. After high school, he studied at Pillsbury College, earning a Bachelor’s degree in Biblical Studies, Greek, and Pastoral Studies. In 1983, Dr. Ley received a B.S. degree in Chemistry and Biology at West Chester University. He continued his education at Pennsylvania State University College of Medicine at Hershey Medical Center, where he earned his M.D. degree in 1987. Dr. Ley returned to Philadelphia for his Internal Medicine residency at Pennsylvania Hospital, followed by an Infectious Disease Fellowship, completed in 1992, at The University of Pennsylvania Hospital. Highlights of his medical education included training electives in Kenya and Uganda, which provided experience in both tropical medicine and mission’s work. His interest in missions also led him to provide general medical care for residents at a faith-based drug rehab center in Philadelphia.

Dr. Ley came to the Delmarva area in 1992, establishing medical practice at Union Hospital in Elkton, Christiana Hospital, Wilmington Hospital, and Saint Francis Hospital. Now in his 25th year of practice, Dr. Ley is a fellow of the American College of Physicians and maintains certification in Infectious Diseases by The American Board of Internal Medicine. Additionally, he is credentialed by Healogics Wound Care for wound care treatment. Since 1999, he has been a wound care physician; previously at Christiana Care and currently at The Union Hospital Would Care Center. Dr. Ley has also served as Chair of Medicine at Union Hospital, and in 2014, he was honored with the Physician of the Year award, by the Union Hospital medical staff. Since 1992, he has treated tuberculosis patients, as chest clinic physician for the Cecil County Health Department.

Dr. Ley is married and has two children. When he is not working, he enjoys fishing, hiking, volunteer work at his church, playing the piano, organ, accordion, and singing.

Education

B.A. Pillsbury Colege, Owatonna, MN. 1981

B.S. West Chester university, PA. 1983

M.D. Pennsylvania State University, Milton S Hershey Medical Center, Hershey, PA. 1987.

Training

1987-1990: Internship and Residency in Internal Medicine, Pennsylvania Hospital, Philadelphia, PA

1990-1992: Fellowship in Infectious Diseases, Unversity of Pennsylvania, Philadelphia, PA

Licenses

Currently Licensed in Maryland and Delaware

FACP (fellow of American college of physicians) 2015

Physician of the Year, Union Hospital of Cecil County, 2014

Wesley W. Emmons III, MD

About

Dr. Wesley Emmons practiced internal medicine for 4 years before completing an Infectious Diseases Fellowship at the National Naval Medical Center in Bethesda MD. After serving a 1 year stint as a co-instructor at the US Navy’s Tropical Medicine School in San Juan, Puerto Rico, he did a 6 year tour as the Infectious Diseases and HIV Division Head at the Naval Medical Center in Portsmouth VA. During his 13 years as a Naval physician, he lived in Puerto Rico and Cairo Egypt, and did tours of duty in Brazil and the Dominican Republic; his overseas experience allowed him to qualify and pass the ASTMH’s Certificate of Knowledge in Clinical Tropical Medicine and Traveler’s Health.He is a Fellow of the ACP and has published 20 manuscripts, written over 7 chapters, and edited numerous articles and 10 chapters for eMedicine and 4 other medical journals. He has written Board questions for the ABIM’s Infectious Disease exam, the ASTMH’s Certificate of Knowledge exam, and the MKSAP. He was voted “Teacher of the Year” 3 times in his career, has been selected as a Delaware “Top Doc” over 5 different times, and is widely sought after for his informative and entertaining lectures. In 2004 he was selected for Christiana Care’s Maxwell Award for compassionate patient care. He has been back in Delaware since 2001 where he enjoys spending time with his wife, children, and grandchildren. Hobbies include SCUBA diving and going to the gym; the youngest participant to complete the New York Marathon in 1973, he once ran 100 miles in 23 hours (at the time a US record for a 21 year old); on another occasion, he did 1,111 situps. He is also known throughout the hospital for his colorful outfits, specifically “Wacky Pants Wednesday” and “Hawaiian Shirt Friday”.

Education

B.S. Ursinus College, Collegeville, PA. 1981

M.D. Pennsylvania State University, Milton S Hershey Medical Center, Hershey, PA. 1985

Training

1985-1988. Internship and Residency in Internal Medicine. Medical Center of Delaware, Wilmington, DE

1992-1994. Fellowship in Infectious Disease, National Naval Medical Center, Bethesda, MD.

Licenses

Voted one of best infectious disease doctors in Delaware, by Delaware Today, 2016, etc

Currently licensed in Maryland and Delaware and Pennsylvania

Certificate of Knowledge in Clnical Tropical Medicine and Traveler’s Health by American Society of Tropical Medicine and Hygiene. 12/6/1997.

Member of IDSA, ACP, Medical Society of Delaware, AMA

Chad Duffalo, MD, MPH

About

Dr. Chad Duffalo started his professional career in pharmacy, working as a registered pharmacist for several years before pursuing his medical degree and Internal Medicine training at Temple University in Philadelphia, PA. He went on to obtain his Infectious Disease training at Tufts University in Boston, MA. As part of specialized training, he completed an additional Masters in Public Health degree, and helped conduct and publish original research on intestinal microbiota. He continues to have an interest in intestinal microbiota, and helps conduct the Christiana Care Health System Fecal Microbiota Transplant program. He has been regularly sighted on the list of "Top Docs" as seen in the Delaware Times, a list voted on by his peers. His experiences in medicine also include studying tropical infectious diseases in Peru, as well as volunteering in Kenya. On a personal note, he has a love of competing in sports, and has endured numerous competitions from marathons to extreme biking races. He has made Delaware his home since 2013, where he enjoys spending time with his family, and continuing to pursue outdoor and sporting adventures.

Education

B.S. Ursinus College, Collegeville, PA. 1981

B.S. University of Pittsburgh School of Pharmacy, Pittsburgh, PA

M.D. Temple University school of Medicine, Philadelphia, PA

MPH Tufts University School of Medicine, Boston, MA

Training

2005-2008 Internship and residency in Internal Medicine, Temple University Hospital

2009-2012 Fellowship in Infectious Diseases, including Research Year, Tufts Medical Center

Licenses

Currently licensed in Maryland and Delaware

Certified by ABIM for ID in 2011

Member of IDSA, Medical Society of Delaware

T. Reena Mascarenhas, MD

About

Dr Mascarenhas was born and raised in India. She attended the well-respected Madurai Medical College, where she earned her medical degree. Driven by her interest in further education abroad, she moved to the United States. She completed her residency training in Internal Medicine at Christiana Care Hospital, and went on to complete a fellowship in Infectious Diseases at Thomas Jefferson University Hospital in Philadelphia. After graduating from Fellowship, she has returned to serve the local community in Delaware and the Christiana Care Health System. She holds a particularly interest in serving the HIV community, and has expertise in treating co-infected HIV patients with Hepatitis C virus. She is interested in Global antibiotic stewardship as well.

Education

2002-2008: Madurai Medical College & Government Rajaji HospitalM

2009 Granted Bachelor of Medicine & Bachelor of Surgery (MBBS) from Tamil Nadu Dr. M.G.R. Medical University

Training

2011-2014 internship and residency in Internal Medicine at Christiana Care Health Services in Newark, DE

2015-2017 Fellowship in Infectious Diseases at Thomas Jefferson University Hospital in Philadelphia, PA

Licenses

Currently licensed in Maryland and Delaware.

Certified by ABIM for Infectious Diseases in 2017

Member of IDSA and American Medical Association.

Renaldo Neeley, MD

About

Dr. Neeley was born and raised in Nassau, Bahamas. He graduated Magna Cum Laude from Elmira College with his Bachelor of Science in Biology. He is a graduate of Ross University School of Medicine. He completed an Internal Medicine Residency at SUNY Downstate Medical Center in Brooklyn, New York and completed his Infectious Disease fellowship at the University of Maryland Medical Center in Baltimore, Maryland. After his fellowship, Dr.Neeley practiced for several years in North Carolina, then relocated to Delaware in 2023 which is when he joined ID Consultants. Dr Neeley’s interests include opportunistic infections, Non-Tuberculosis Mycobacterium infections and prosthetic joint infections. In his free time, Dr. Neeley enjoys traveling, theater and physical fitness.

Education

B.S. Elmira College, Elmira NY. 2010

M.D. Ross University School of Medicine, Dominica West Indies. 2015

Training

2015-2018 Internship and Residency in Internal Medicine SUNY Downstate Medical Center, Brooklyn, NY

2018-2020 Fellowship in Infectious Disease, University of Maryland Medical Center, Baltimore, MD

Licenses

Currently Licensed in Maryland and Delaware.

Certified by ABIM for Infectious Disease 2020.

Member of IDSA and American Medical Association